From 93dd63d5ed536ac579a76ed9fb3880d43d24d4b4 Mon Sep 17 00:00:00 2001
From: Jakob <jakob.dekleva@gmail.com>
Date: Mon, 5 May 2025 17:47:55 +0200
Subject: [PATCH 1/8] Chore: debug stuff

---
 src/attacks.zig  | 19 +++++-----
 src/bitboard.zig | 92 +++++++++++++++++++++++++++++++++++++++++-------
 src/main.zig     | 17 +++++----
 3 files changed, 98 insertions(+), 30 deletions(-)

diff --git a/src/attacks.zig b/src/attacks.zig
index d8e04a2..f387efd 100644
--- a/src/attacks.zig
+++ b/src/attacks.zig
@@ -40,25 +40,21 @@ pub var pawn_attacks: [2][64]u64 = undefined;
 pub var pseudo_legal_attacks: [6][64]u64 = undefined;
 
 pub fn initialise_pseudo_legal() void {
-    // copy pawn-attack tables directly
     pawn_attacks[0] = tabele.White_pawn_attacks_tabele;
     pawn_attacks[1] = tabele.Black_pawn_attacks_tabele;
 
-    // copy fixed knight & king tables
     const knight_i = @intFromEnum(types.PieceType.Knight);
     const king_i = @intFromEnum(types.PieceType.King);
     pseudo_legal_attacks[knight_i] = tabele.Knight_attackes_tabele;
     pseudo_legal_attacks[king_i] = tabele.King_attackes_tabele;
 
-    // build rook, bishop, queen on empty board
     const rook_i = @intFromEnum(types.PieceType.Rook);
     const bishop_i = @intFromEnum(types.PieceType.Bishop);
     const queen_i = @intFromEnum(types.PieceType.Queen);
 
-    // single pass over all 64 squares
     for (types.square_number) |s| {
         const sq: u8 = @intCast(s);
-        const occ = 0; // empty occupancy
+        const occ = 0;
 
         // sliding attacks
         const r_att = get_rook_attacks_for_init(sq, occ);
@@ -70,7 +66,6 @@ pub fn initialise_pseudo_legal() void {
     }
 }
 
-/// Returns the pawn-attack mask for square `s` (0..63) and color `c`
 pub inline fn pawn_attacks_from_square(s: usize, c: types.Color) u64 {
     return pawn_attacks[@intFromEnum(c)][s];
 }
@@ -216,6 +211,14 @@ pub inline fn get_rook_attacks(square: u6, occ: u64) u64 {
     const shift: u6 = @intCast(64 - tabele.Rook_index_bit[square]);
     const relevant: u64 = occ & mask;
     const idx: usize = @intCast((relevant *% magic) >> shift);
+
+    // const result = Rook_attacks[square][idx];
+    //
+    // std.debug.print("LOOKUP sq={} mask=0x{x} occ&mask=0x{x}\n", .{ square, mask, relevant });
+    // std.debug.print("       magic=0x{x} shift={} → idx={} → result=0x{x}\n\n", .{ magic, shift, idx, result });
+    //
+    // bitboard.print_board(result);
+    //
     return Rook_attacks[square][idx];
 }
 
@@ -272,13 +275,13 @@ pub inline fn get_queen_attacks(square: u6, occ: u64) u64 {
     return queen_attacks;
 }
 
-pub fn piece_attacks(square: u6, occ: u64, comptime Piece: types.PieceType) void {
+pub fn piece_attacks(square: u6, occ: u64, comptime Piece: types.PieceType) types.Bitboard {
     if (Piece != types.PieceType.Pawn) {
         return switch (Piece) {
             types.PieceType.Bishop => get_bishop_attacks(square, occ),
             types.PieceType.Rook => get_rook_attacks(square, occ),
             types.PieceType.Queen => get_queen_attacks(square, occ),
-            else => print("pseudo legal attacks", .{}),
+            else => (&pseudo_legal_attacks)[Piece.toU3()][square],
         };
     } else {
         @panic("don't pass pawns");
diff --git a/src/bitboard.zig b/src/bitboard.zig
index 906c46f..6b792af 100644
--- a/src/bitboard.zig
+++ b/src/bitboard.zig
@@ -2,6 +2,7 @@ const std = @import("std");
 const util = @import("util.zig");
 const types = @import("types.zig");
 const attacks = @import("attacks.zig");
+const tables = @import("tabeles.zig");
 const print = std.debug.print;
 
 pub fn print_board(bitboard: types.Bitboard) void {
@@ -56,8 +57,9 @@ pub fn print_unicode_board(board: types.Board) void {
     print(" Bitboard: 0x{0x}\n", .{board.pieces_combined()});
     print(" Bitboard: 0b{b}\n\n", .{board.pieces_combined()});
 }
+
 // TODO fix bug on the whitte side
-//  8  .  .  .  .  .  .  .  .
+//  7  .  .  .  .  .  .  .  .
 // 7  .  .  .  .  .  .  .  X
 // 6  .  .  .  .  .  .  X  .
 // 5  .  .  .  .  .  X  .  .
@@ -65,7 +67,7 @@ pub fn print_unicode_board(board: types.Board) void {
 // 3  X  X  X  X  X  X  X  X
 // 2  X  X  X  X  X  X  X  X
 // 1  .  X  X  X  X  X  X  .
-pub fn print_attacked_squares(board: *types.Board) void {
+pub fn print_attacked_squares(board: types.Board) void {
     const occ = board.pieces_combined();
     const bbs = board.pieces;
     const side = board.side;
@@ -76,21 +78,20 @@ pub fn print_attacked_squares(board: *types.Board) void {
         print("  {} ", .{8 - rank});
         for (0..8) |file| {
             const square: u6 = @intCast(rank * 8 + file);
-            const sq_bb = types.squar_bb[square];
             const attacked = switch (side) {
-                .White => (attacks.pawn_attacks_from_bitboard(.White, sq_bb) & bbs[@intFromEnum(types.Piece.WHITE_PAWN)]) != 0 or
-                    (attacks.knight_attacks_from_bitboard(sq_bb) & bbs[@intFromEnum(types.Piece.WHITE_KNIGHT)]) != 0 or
-                    (attacks.get_bishop_attacks(square, occ) & bbs[@intFromEnum(types.Piece.WHITE_BISHOP)]) != 0 or
-                    (attacks.get_rook_attacks(square, occ) & bbs[@intFromEnum(types.Piece.WHITE_ROOK)]) != 0 or
+                .White => (attacks.pawn_attacks_from_square(square, .Black) & bbs[@intFromEnum(types.Piece.WHITE_PAWN)]) != 0 or
+                    (attacks.piece_attacks(square, occ, types.PieceType.Knight) & bbs[@intFromEnum(types.Piece.WHITE_KNIGHT)]) != 0 or
+                    (attacks.piece_attacks(square, occ, types.PieceType.Bishop) & bbs[@intFromEnum(types.Piece.WHITE_BISHOP)]) != 0 or
+                    (attacks.piece_attacks(square, occ, types.PieceType.Rook) & bbs[@intFromEnum(types.Piece.WHITE_ROOK)]) != 0 or
                     (attacks.get_queen_attacks(square, occ) & bbs[@intFromEnum(types.Piece.WHITE_QUEEN)]) != 0 or
-                    (attacks.king_attacks_from_bitboard(sq_bb) & bbs[@intFromEnum(types.Piece.WHITE_KING)]) != 0,
+                    (attacks.piece_attacks(square, occ, types.PieceType.King) & bbs[@intFromEnum(types.Piece.WHITE_KING)]) != 0,
 
-                .Black => (attacks.pawn_attacks_from_bitboard(.Black, sq_bb) & bbs[@intFromEnum(types.Piece.BLACK_PAWN)]) != 0 or
-                    (attacks.knight_attacks_from_bitboard(sq_bb) & bbs[@intFromEnum(types.Piece.BLACK_KNIGHT)]) != 0 or
-                    (attacks.get_bishop_attacks(square, occ) & bbs[@intFromEnum(types.Piece.BLACK_BISHOP)]) != 0 or
-                    (attacks.get_rook_attacks(square, occ) & bbs[@intFromEnum(types.Piece.BLACK_ROOK)]) != 0 or
+                .Black => (attacks.pawn_attacks_from_square(square, .White) & bbs[@intFromEnum(types.Piece.BLACK_PAWN)]) != 0 or
+                    (attacks.piece_attacks(square, occ, types.PieceType.Knight) & bbs[@intFromEnum(types.Piece.BLACK_KNIGHT)]) != 0 or
+                    (attacks.piece_attacks(square, occ, types.PieceType.Bishop) & bbs[@intFromEnum(types.Piece.BLACK_BISHOP)]) != 0 or
+                    (attacks.piece_attacks(square, occ, types.PieceType.Rook) & bbs[@intFromEnum(types.Piece.BLACK_ROOK)]) != 0 or
                     (attacks.get_queen_attacks(square, occ) & bbs[@intFromEnum(types.Piece.BLACK_QUEEN)]) != 0 or
-                    (attacks.king_attacks_from_bitboard(sq_bb) & bbs[@intFromEnum(types.Piece.BLACK_KING)]) != 0,
+                    (attacks.piece_attacks(square, occ, types.PieceType.King) & bbs[@intFromEnum(types.Piece.BLACK_KING)]) != 0,
 
                 else => unreachable,
             };
@@ -103,6 +104,71 @@ pub fn print_attacked_squares(board: *types.Board) void {
     print("\n   a  b  c  d  e  f  g  h\n", .{});
 }
 
+pub fn is_square_attacked(
+    square: u6,
+    by: types.Color,
+    board: types.Board,
+) bool {
+    const occAll = board.pieces_combined();
+
+    // Bishop/Queen attackers (diagonals)
+    const bishopMask = attacks.get_bishop_attacks(square, occAll);
+    const bishopAttackers = bishopMask & (board.pieces[
+        if (by == .White)
+            types.Piece.WHITE_BISHOP.toU4()
+        else
+            types.Piece.BLACK_BISHOP.toU4()
+    ] | board.pieces[
+        if (by == .White)
+            types.Piece.WHITE_QUEEN.toU4()
+        else
+            types.Piece.BLACK_QUEEN.toU4()
+    ]);
+    std.debug.print("  bishopMask    : 0x{x}\n", .{bishopMask});
+    std.debug.print("  bishopAttackers: 0x{x}\n", .{bishopAttackers});
+
+    // Rook/Queen attackers (ranks & files)
+    const rookMask = attacks.get_rook_attacks(square, occAll);
+    const rookAttackers = rookMask & (board.pieces[
+        if (by == .White)
+            types.Piece.WHITE_ROOK.toU4()
+        else
+            types.Piece.BLACK_ROOK.toU4()
+    ] | board.pieces[
+        if (by == .White)
+            types.Piece.WHITE_QUEEN.toU4()
+        else
+            types.Piece.BLACK_QUEEN.toU4()
+    ]);
+    // std.debug.print("  rookMask      : 0x{x}\n", .{rookMask});
+    // std.debug.print("  rookAttackers : 0x{x}\n", .{rookAttackers});
+
+    // Combine all attackers
+    const attackers = bishopAttackers | rookAttackers;
+    std.debug.print("  combined attackers: 0x{x}\n", .{attackers});
+
+    return attackers != 0;
+}
+
+pub fn print_attacked_squares_new(board: types.Board) void {
+    const side = board.side;
+
+    std.debug.print("=== attacked squares for side: {} ===\n", .{side});
+    print("\n", .{});
+    for (0..8) |r| {
+        print("  {} ", .{8 - r});
+        for (0..8) |c| {
+            const sq: u6 = @intCast(r * 8 + c);
+            const attacked = is_square_attacked(sq, side, board);
+            const ch: u8 = if (attacked) 'X' else '.';
+            print(" {c} ", .{ch});
+        }
+        print("\n", .{});
+    }
+    print("\n   a  b  c  d  e  f  g  h\n\n", .{});
+    std.debug.print("=== end attacked squares ===\n", .{});
+}
+
 pub const FenError = error{
     InvalidFormat,
     InvalidPosition,
diff --git a/src/main.zig b/src/main.zig
index 63d6328..4c53b5b 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -10,15 +10,14 @@ pub fn main() !void {
     attacks.init_attacks();
 
     var b = types.Board.new();
-    //try bitboard.fan_pars(types.start_position, &b);
+    try bitboard.fan_pars(types.start_position, &b);
 
-    //const bb = b.pieces_combined();
-    //print("Occupancy (hex): 0x{x}\n", .{bb});
-
-    const mybb = b.set_pieces(types.Color.White);
-    bitboard.print_board(mybb);
-    bitboard.print_unicode_board(b);
+    const bb = b.pieces_combined();
+    print("Occupancy (hex): 0x{x}\n", .{bb});
     b.side = types.Color.White;
-
-    bitboard.print_attacked_squares(&b);
+    bitboard.print_unicode_board(b);
+    //bitboard.print_attacked_squares(&b);
+    bitboard.print_attacked_squares_new(b);
+    bitboard.print_unicode_board(b);
+    bitboard.print_board(b.pieces_combined());
 }

From ed70404c9ef0fdb1aac13e0cae7494206400981a Mon Sep 17 00:00:00 2001
From: Jakob <jakob.dekleva@gmail.com>
Date: Tue, 6 May 2025 17:13:10 +0200
Subject: [PATCH 2/8] Chore: add more debuge stuff

---
 src/bitboard.zig | 1 +
 src/main.zig     | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/bitboard.zig b/src/bitboard.zig
index 6b792af..daef9bc 100644
--- a/src/bitboard.zig
+++ b/src/bitboard.zig
@@ -125,6 +125,7 @@ pub fn is_square_attacked(
             types.Piece.BLACK_QUEEN.toU4()
     ]);
     std.debug.print("  bishopMask    : 0x{x}\n", .{bishopMask});
+    print_board(bishopMask);
     std.debug.print("  bishopAttackers: 0x{x}\n", .{bishopAttackers});
 
     // Rook/Queen attackers (ranks & files)
diff --git a/src/main.zig b/src/main.zig
index 4c53b5b..2aacd5a 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -14,7 +14,9 @@ pub fn main() !void {
 
     const bb = b.pieces_combined();
     print("Occupancy (hex): 0x{x}\n", .{bb});
-    b.side = types.Color.White;
+
+    bitboard.print_unicode_board(b);
+    b.side = types.Color.Black;
     bitboard.print_unicode_board(b);
     //bitboard.print_attacked_squares(&b);
     bitboard.print_attacked_squares_new(b);

From 80f4386261c025f794638f1b287c11439ca62bc9 Mon Sep 17 00:00:00 2001
From: Jakob <jakob.dekleva@gmail.com>
Date: Thu, 12 Jun 2025 09:52:16 +0200
Subject: [PATCH 3/8] Chore: add debug stuff

---
 src/attacks.zig  |   30 +-
 src/bitboard.zig |   37 +-
 src/main.zig     |    6 +-
 src/types.zig    |    4 +
 temp.txt         | 1390 ++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 1446 insertions(+), 21 deletions(-)
 create mode 100644 temp.txt

diff --git a/src/attacks.zig b/src/attacks.zig
index f387efd..f5a79be 100644
--- a/src/attacks.zig
+++ b/src/attacks.zig
@@ -223,17 +223,7 @@ pub inline fn get_rook_attacks(square: u6, occ: u64) u64 {
 }
 
 pub inline fn get_bishop_attacks_for_init(square: u8, occ: u64) u64 {
-    const rank_i8: i8 = @intCast(square / 8);
-    const file_i8: i8 = @intCast(square % 8);
-    const diag_i: i8 = rank_i8 - file_i8 + 7;
-    const anti_i: i8 = rank_i8 + file_i8;
-    const diag_idx: usize = @intCast(diag_i);
-    const anti_idx: usize = @intCast(anti_i);
-    const mask1: u64 = types.mask_diagonal_nw_se[diag_idx];
-    const mask2: u64 = types.mask_anti_diagonal_ne_sw[anti_idx];
-    const att1 = sliding_attacks(square, occ, mask1);
-    const att2 = sliding_attacks(square, occ, mask2);
-    return att1 | att2;
+    return get_bishop_attacks_for_init(square, occ);
 }
 
 //  bishop magice Bitboards
@@ -244,16 +234,28 @@ pub inline fn init_bishop_attackes() void {
         const mask = tabele.Bishops_attackes_tabele[square];
         const relevantBits = tabele.Bishop_index_bit[square];
         const magic = tabele.bishop_magics[square];
-
         const shift: u6 = @truncate(64 - relevantBits);
         const sq6 = @as(u8, @intCast(square));
-        var subset: types.Bitboard = mask;
 
+        // Clear the table for this square first
+        const table_size = @as(usize, 1) << @intCast(relevantBits);
+        @memset(Bishop_attacks[square][0..table_size], 0);
+
+        var subset: types.Bitboard = mask;
         while (true) {
             var idx64: u64 = @as(u64, subset) *% magic;
             idx64 = idx64 >> shift;
             const idx: usize = @intCast(idx64);
-            Bishop_attacks[square][idx] = get_bishop_attacks_for_init(sq6, subset);
+
+            const correct_attacks = get_bishop_attacks_for_init(sq6, subset);
+
+            // Check for collision
+            if (Bishop_attacks[square][idx] != 0 and Bishop_attacks[square][idx] != correct_attacks) {
+                std.debug.panic("Magic collision detected for bishop square {} at index {}: existing=0x{x}, new=0x{x}\n", .{ square, idx, Bishop_attacks[square][idx], correct_attacks });
+            }
+
+            Bishop_attacks[square][idx] = correct_attacks;
+
             if (subset == 0) break;
             subset = (subset - 1) & mask;
         }
diff --git a/src/bitboard.zig b/src/bitboard.zig
index daef9bc..c4b2a5d 100644
--- a/src/bitboard.zig
+++ b/src/bitboard.zig
@@ -67,7 +67,7 @@ pub fn print_unicode_board(board: types.Board) void {
 // 3  X  X  X  X  X  X  X  X
 // 2  X  X  X  X  X  X  X  X
 // 1  .  X  X  X  X  X  X  .
-pub fn print_attacked_squares(board: types.Board) void {
+pub fn print_attacked_squares(board: *types.Board) void {
     const occ = board.pieces_combined();
     const bbs = board.pieces;
     const side = board.side;
@@ -104,6 +104,33 @@ pub fn print_attacked_squares(board: types.Board) void {
     print("\n   a  b  c  d  e  f  g  h\n", .{});
 }
 
+pub fn debug_bishop_attack(square: u6, occ: u64) void {
+    const mask = tables.Bishops_attackes_tabele[square];
+    const magic = tables.bishop_magics[square];
+    const relevantBits = tables.Bishop_index_bit[square];
+    const shift: u6 = @intCast(64 - relevantBits);
+    const relevant = occ & mask;
+    const raw_idx = (relevant *% magic) >> shift;
+    const idx: usize = @intCast(raw_idx);
+    const result = attacks.Bishop_attacks[square][idx];
+
+    std.debug.print("=== BISHOP DEBUG for square {} ===\n", .{square});
+    std.debug.print("  occ=0x{x}\n", .{occ});
+    std.debug.print("  mask=0x{x}\n", .{mask});
+    std.debug.print("  relevant=0x{x}\n", .{relevant});
+    std.debug.print("  magic=0x{x}\n", .{magic});
+    std.debug.print("  shift={}\n", .{shift});
+    std.debug.print("  raw_idx={}\n", .{raw_idx});
+    std.debug.print("  idx={}\n", .{idx});
+    std.debug.print("  result=0x{x}\n", .{result});
+
+    // Compare with direct calculation
+    const direct = attacks.get_bishop_attacks_for_init(@intCast(square), occ);
+    std.debug.print("  direct=0x{x}\n", .{direct});
+    std.debug.print("  match: {}\n", .{result == direct});
+    std.debug.print("===============================\n\n", .{});
+}
+
 pub fn is_square_attacked(
     square: u6,
     by: types.Color,
@@ -111,6 +138,10 @@ pub fn is_square_attacked(
 ) bool {
     const occAll = board.pieces_combined();
 
+    if (square == 15 or square == 22 or square == 29 or square == 36) { // a8 for example, or pick any square showing wrong results
+        debug_bishop_attack(square, occAll);
+    }
+
     // Bishop/Queen attackers (diagonals)
     const bishopMask = attacks.get_bishop_attacks(square, occAll);
     const bishopAttackers = bishopMask & (board.pieces[
@@ -141,8 +172,8 @@ pub fn is_square_attacked(
         else
             types.Piece.BLACK_QUEEN.toU4()
     ]);
-    // std.debug.print("  rookMask      : 0x{x}\n", .{rookMask});
-    // std.debug.print("  rookAttackers : 0x{x}\n", .{rookAttackers});
+    std.debug.print("  rookMask      : 0x{x}\n", .{rookMask});
+    std.debug.print("  rookAttackers : 0x{x}\n", .{rookAttackers});
 
     // Combine all attackers
     const attackers = bishopAttackers | rookAttackers;
diff --git a/src/main.zig b/src/main.zig
index 2aacd5a..afaa77a 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -16,10 +16,8 @@ pub fn main() !void {
     print("Occupancy (hex): 0x{x}\n", .{bb});
 
     bitboard.print_unicode_board(b);
-    b.side = types.Color.Black;
+    b.side = types.Color.White;
     bitboard.print_unicode_board(b);
-    //bitboard.print_attacked_squares(&b);
+    bitboard.print_attacked_squares(&b);
     bitboard.print_attacked_squares_new(b);
-    bitboard.print_unicode_board(b);
-    bitboard.print_board(b.pieces_combined());
 }
diff --git a/src/types.zig b/src/types.zig
index efe0cc3..7dbd07a 100644
--- a/src/types.zig
+++ b/src/types.zig
@@ -74,6 +74,10 @@ pub const PieceType = enum(u8) {
     Rook,
     Queen,
     King,
+
+    pub inline fn toU3(self: PieceType) u3 {
+        return @intFromEnum(self);
+    }
 };
 
 pub const Piece = enum(u8) {
diff --git a/temp.txt b/temp.txt
new file mode 100644
index 0000000..655ebd2
--- /dev/null
+++ b/temp.txt
@@ -0,0 +1,1390 @@
+Occupancy (hex): 0xffff00000000ffff
+
+  8  ♖ ♘ ♗ ♕ ♔ ♗ ♘ ♖
+  7  ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙
+  6  . . . . . . . .
+  5  . . . . . . . .
+  4  . . . . . . . .
+  3  . . . . . . . .
+  2  ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎
+  1  ♜ ♞ ♝ ♛ ♚ ♝ ♞ ♜
+
+     a b c d e f g h
+
+ Side: White
+ Bitboard: 0xffff00000000ffff
+ Bitboard: 0b1111111111111111000000000000000000000000000000001111111111111111
+
+
+  8  ♖ ♘ ♗ ♕ ♔ ♗ ♘ ♖
+  7  ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙
+  6  . . . . . . . .
+  5  . . . . . . . .
+  4  . . . . . . . .
+  3  . . . . . . . .
+  2  ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎
+  1  ♜ ♞ ♝ ♛ ♚ ♝ ♞ ♜
+
+     a b c d e f g h
+
+ Side: White
+ Bitboard: 0xffff00000000ffff
+ Bitboard: 0b1111111111111111000000000000000000000000000000001111111111111111
+
+
+  8  .  .  .  .  .  .  .  . 
+  7  .  .  .  .  .  .  .  X 
+  6  .  .  .  .  .  .  X  . 
+  5  .  .  .  .  .  X  .  . 
+  4  .  .  .  .  .  .  .  . 
+  3  X  .  X  X  .  X  .  X 
+  2  X  X  X  X  X  X  X  X 
+  1  X  X  X  X  X  X  X  X 
+
+   a  b  c  d  e  f  g  h
+=== attacked squares for side: types.Color.White ===
+
+  8   bishopMask    : 0x200
+
+  8  0 0 0 0 0 0 0 0
+  7  0 1 0 0 0 0 0 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  0 0 0 0 0 0 0 0
+  2  0 0 0 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x200
+ Bitboard: 0b1000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x102
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x500
+
+  8  0 0 0 0 0 0 0 0
+  7  1 0 1 0 0 0 0 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  0 0 0 0 0 0 0 0
+  2  0 0 0 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x500
+ Bitboard: 0b10100000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x205
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0xa00
+
+  8  0 0 0 0 0 0 0 0
+  7  0 1 0 1 0 0 0 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  0 0 0 0 0 0 0 0
+  2  0 0 0 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0xa00
+ Bitboard: 0b101000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x40a
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x1400
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 1 0 1 0 0 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  0 0 0 0 0 0 0 0
+  2  0 0 0 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x1400
+ Bitboard: 0b1010000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x814
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x2800
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 1 0 1 0 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  0 0 0 0 0 0 0 0
+  2  0 0 0 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x2800
+ Bitboard: 0b10100000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x1028
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x5000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 1 0 1 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  0 0 0 0 0 0 0 0
+  2  0 0 0 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x5000
+ Bitboard: 0b101000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x2050
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0xa000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 1 0 1
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  0 0 0 0 0 0 0 0
+  2  0 0 0 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0xa000
+ Bitboard: 0b1010000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x40a0
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x4000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 0 1 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  0 0 0 0 0 0 0 0
+  2  0 0 0 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x4000
+ Bitboard: 0b100000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x8040
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ . 
+  7   bishopMask    : 0x20100804020002
+
+  8  0 1 0 0 0 0 0 0
+  7  0 0 0 0 0 0 0 0
+  6  0 1 0 0 0 0 0 0
+  5  0 0 1 0 0 0 0 0
+  4  0 0 0 1 0 0 0 0
+  3  0 0 0 0 1 0 0 0
+  2  0 0 0 0 0 1 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x20100804020002
+ Bitboard: 0b100000000100000000100000000100000000100000000000000010
+
+  bishopAttackers: 0x0
+  rookMask      : 0x1010101010201
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x40201008050005
+
+  8  1 0 1 0 0 0 0 0
+  7  0 0 0 0 0 0 0 0
+  6  1 0 1 0 0 0 0 0
+  5  0 0 0 1 0 0 0 0
+  4  0 0 0 0 1 0 0 0
+  3  0 0 0 0 0 1 0 0
+  2  0 0 0 0 0 0 1 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x40201008050005
+ Bitboard: 0b1000000001000000001000000001000000001010000000000000101
+
+  bishopAttackers: 0x0
+  rookMask      : 0x2020202020502
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x804020110a000a
+
+  8  0 1 0 1 0 0 0 0
+  7  0 0 0 0 0 0 0 0
+  6  0 1 0 1 0 0 0 0
+  5  1 0 0 0 1 0 0 0
+  4  0 0 0 0 0 1 0 0
+  3  0 0 0 0 0 0 1 0
+  2  0 0 0 0 0 0 0 1
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x804020110a000a
+ Bitboard: 0b10000000010000000010000000010001000010100000000000001010
+
+  bishopAttackers: 0x0
+  rookMask      : 0x4040404040a04
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x804122140014
+
+  8  0 0 1 0 1 0 0 0
+  7  0 0 0 0 0 0 0 0
+  6  0 0 1 0 1 0 0 0
+  5  0 1 0 0 0 1 0 0
+  4  1 0 0 0 0 0 1 0
+  3  0 0 0 0 0 0 0 1
+  2  0 0 0 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x804122140014
+ Bitboard: 0b100000000100000100100010000101000000000000010100
+
+  bishopAttackers: 0x0
+  rookMask      : 0x8080808081408
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x18244280028
+
+  8  0 0 0 1 0 1 0 0
+  7  0 0 0 0 0 0 0 0
+  6  0 0 0 1 0 1 0 0
+  5  0 0 1 0 0 0 1 0
+  4  0 1 0 0 0 0 0 1
+  3  1 0 0 0 0 0 0 0
+  2  0 0 0 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x18244280028
+ Bitboard: 0b11000001001000100001010000000000000101000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x10101010102810
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x1020488500050
+
+  8  0 0 0 0 1 0 1 0
+  7  0 0 0 0 0 0 0 0
+  6  0 0 0 0 1 0 1 0
+  5  0 0 0 1 0 0 0 1
+  4  0 0 1 0 0 0 0 0
+  3  0 1 0 0 0 0 0 0
+  2  1 0 0 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x1020488500050
+ Bitboard: 0b1000000100000010010001000010100000000000001010000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x20202020205020
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x2040810a000a0
+
+  8  0 0 0 0 0 1 0 1
+  7  0 0 0 0 0 0 0 0
+  6  0 0 0 0 0 1 0 1
+  5  0 0 0 0 1 0 0 0
+  4  0 0 0 1 0 0 0 0
+  3  0 0 1 0 0 0 0 0
+  2  0 1 0 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x2040810a000a0
+ Bitboard: 0b10000001000000100000010000101000000000000010100000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x4040404040a040
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ . === BISHOP DEBUG for square 15 ===
+  occ=0xffff00000000ffff
+  mask=0x4081020400000
+  relevant=0x4000000000000
+  magic=0x2082082000
+  shift=59
+  raw_idx=16
+  idx=16
+  result=0x2040810204080040
+  direct=0x40810204080040
+  match: false
+===============================
+
+  bishopMask    : 0x2040810204080040
+
+  8  0 0 0 0 0 0 1 0
+  7  0 0 0 0 0 0 0 0
+  6  0 0 0 1 0 0 0 0
+  5  0 0 1 0 0 0 0 0
+  4  0 1 0 0 0 0 0 0
+  3  1 0 0 0 0 0 0 1
+  2  0 0 0 0 0 0 1 0
+  1  0 0 0 0 0 1 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x2040810204080040
+ Bitboard: 0b10000001000000100000010000001000000100000010000000000001000000
+
+  bishopAttackers: 0x2000000000000000
+  rookMask      : 0x80808080804080
+  rookAttackers : 0x0
+  combined attackers: 0x2000000000000000
+ X 
+  6   bishopMask    : 0x10080402000200
+
+  8  0 0 0 0 0 0 0 0
+  7  0 1 0 0 0 0 0 0
+  6  0 0 0 0 0 0 0 0
+  5  0 1 0 0 0 0 0 0
+  4  0 0 1 0 0 0 0 0
+  3  0 0 0 1 0 0 0 0
+  2  0 0 0 0 1 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x10080402000200
+ Bitboard: 0b10000000010000000010000000010000000000000001000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x1010101fe0100
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x20100805000500
+
+  8  0 0 0 0 0 0 0 0
+  7  1 0 1 0 0 0 0 0
+  6  0 0 0 0 0 0 0 0
+  5  1 0 1 0 0 0 0 0
+  4  0 0 0 1 0 0 0 0
+  3  0 0 0 0 1 0 0 0
+  2  0 0 0 0 0 1 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x20100805000500
+ Bitboard: 0b100000000100000000100000000101000000000000010100000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x2020202fd0200
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x4020110a000a00
+
+  8  0 0 0 0 0 0 0 0
+  7  0 1 0 1 0 0 0 0
+  6  0 0 0 0 0 0 0 0
+  5  0 1 0 1 0 0 0 0
+  4  1 0 0 0 1 0 0 0
+  3  0 0 0 0 0 1 0 0
+  2  0 0 0 0 0 0 1 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x4020110a000a00
+ Bitboard: 0b1000000001000000001000100001010000000000000101000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x4040404fb0400
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x80412214001400
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 1 0 1 0 0 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 1 0 1 0 0 0
+  4  0 1 0 0 0 1 0 0
+  3  1 0 0 0 0 0 1 0
+  2  0 0 0 0 0 0 0 1
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x80412214001400
+ Bitboard: 0b10000000010000010010001000010100000000000001010000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x8080808f70800
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x1824428002800
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 1 0 1 0 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 1 0 1 0 0
+  4  0 0 1 0 0 0 1 0
+  3  0 1 0 0 0 0 0 1
+  2  1 0 0 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x1824428002800
+ Bitboard: 0b1100000100100010000101000000000000010100000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x10101010ef1000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x2048850005000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 1 0 1 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 0 1 0 1 0
+  4  0 0 0 1 0 0 0 1
+  3  0 0 1 0 0 0 0 0
+  2  0 1 0 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x2048850005000
+ Bitboard: 0b10000001001000100001010000000000000101000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x20202020df2000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ . === BISHOP DEBUG for square 22 ===
+  occ=0xffff00000000ffff
+  mask=0x4081020002000
+  relevant=0x4000000002000
+  magic=0x400082082000
+  shift=59
+  raw_idx=17
+  idx=17
+  result=0x2040810284082000
+  direct=0x40810284082000
+  match: false
+===============================
+
+  bishopMask    : 0x2040810284082000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 1 0 0
+  6  0 0 0 1 0 0 0 0
+  5  0 0 1 0 0 0 0 1
+  4  0 1 0 0 0 0 0 0
+  3  1 0 0 0 0 0 0 1
+  2  0 0 0 0 0 0 1 0
+  1  0 0 0 0 0 1 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x2040810284082000
+ Bitboard: 0b10000001000000100000010000001010000100000010000010000000000000
+
+  bishopAttackers: 0x2000000000000000
+  rookMask      : 0x40404040bf4000
+  rookAttackers : 0x0
+  combined attackers: 0x2000000000000000
+ X   bishopMask    : 0x4081020408004000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 0 1 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 1 0 0 0 0
+  4  0 0 1 0 0 0 0 0
+  3  0 1 0 0 0 0 0 0
+  2  1 0 0 0 0 0 0 1
+  1  0 0 0 0 0 0 1 0
+
+     a b c d e f g h
+
+ Bitboard: 0x4081020408004000
+ Bitboard: 0b100000010000001000000100000010000001000000000000100000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x808080807f8000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ . 
+  5   bishopMask    : 0x8040200020400
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 1 0 0 0 0 0
+  6  0 1 0 0 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 1 0 0 0 0 0 0
+  3  0 0 1 0 0 0 0 0
+  2  0 0 0 1 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x8040200020400
+ Bitboard: 0b1000000001000000001000000000000000100000010000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x10101fe010100
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x10080500050800
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 1 0 0 0 0
+  6  1 0 1 0 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  1 0 1 0 0 0 0 0
+  3  0 0 0 1 0 0 0 0
+  2  0 0 0 0 1 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x10080500050800
+ Bitboard: 0b10000000010000000010100000000000001010000100000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x20202fd020200
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x20110a000a1100
+
+  8  0 0 0 0 0 0 0 0
+  7  1 0 0 0 1 0 0 0
+  6  0 1 0 1 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 1 0 1 0 0 0 0
+  3  1 0 0 0 1 0 0 0
+  2  0 0 0 0 0 1 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x20110a000a1100
+ Bitboard: 0b100000000100010000101000000000000010100001000100000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x40404fb040400
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x41221400142200
+
+  8  0 0 0 0 0 0 0 0
+  7  0 1 0 0 0 1 0 0
+  6  0 0 1 0 1 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 1 0 1 0 0 0
+  3  0 1 0 0 0 1 0 0
+  2  1 0 0 0 0 0 1 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x41221400142200
+ Bitboard: 0b1000001001000100001010000000000000101000010001000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x80808f7080800
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x82442800284400
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 1 0 0 0 1 0
+  6  0 0 0 1 0 1 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 0 1 0 1 0 0
+  3  0 0 1 0 0 0 1 0
+  2  0 1 0 0 0 0 0 1
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x82442800284400
+ Bitboard: 0b10000010010001000010100000000000001010000100010000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x101010ef101000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ . === BISHOP DEBUG for square 29 ===
+  occ=0xffff00000000ffff
+  mask=0x4085000500800
+  relevant=0x4000000000800
+  magic=0x404002011000
+  shift=57
+  raw_idx=33
+  idx=33
+  result=0x2040814204180800
+  direct=0x40814204180800
+  match: false
+===============================
+
+  bishopMask    : 0x2040814204180800
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 1 0 0 0 0
+  6  0 0 0 1 1 0 0 0
+  5  0 0 1 0 0 0 0 0
+  4  0 1 0 0 0 0 1 0
+  3  1 0 0 0 0 0 0 1
+  2  0 0 0 0 0 0 1 0
+  1  0 0 0 0 0 1 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x2040814204180800
+ Bitboard: 0b10000001000000100000010100001000000100000110000000100000000000
+
+  bishopAttackers: 0x2000000000000000
+  rookMask      : 0x202020df202000
+  rookAttackers : 0x0
+  combined attackers: 0x2000000000000000
+ X   bishopMask    : 0x4081028408201000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 1 0 0 0
+  6  0 0 0 0 0 1 0 0
+  5  0 0 0 1 0 0 0 0
+  4  0 0 1 0 0 0 0 1
+  3  0 1 0 0 0 0 0 0
+  2  1 0 0 0 0 0 0 1
+  1  0 0 0 0 0 0 1 0
+
+     a b c d e f g h
+
+ Bitboard: 0x4081028408201000
+ Bitboard: 0b100000010000001000000101000010000001000001000000001000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x404040bf404000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x8102040800402000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 1 0 0
+  6  0 0 0 0 0 0 1 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 0 1 0 0 0 0
+  3  0 0 1 0 0 0 0 0
+  2  0 1 0 0 0 0 0 0
+  1  1 0 0 0 0 0 0 1
+
+     a b c d e f g h
+
+ Bitboard: 0x8102040800402000
+ Bitboard: 0b1000000100000010000001000000100000000000010000000010000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x8080807f808000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ . 
+  4   bishopMask    : 0x4020002040800
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 1 0 0 0 0
+  6  0 0 1 0 0 0 0 0
+  5  0 1 0 0 0 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  0 1 0 0 0 0 0 0
+  2  0 0 1 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x4020002040800
+ Bitboard: 0b100000000100000000000000010000001000000100000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x101fe01010100
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x8050005081000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 1 0 0 0
+  6  0 0 0 1 0 0 0 0
+  5  1 0 1 0 0 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  1 0 1 0 0 0 0 0
+  2  0 0 0 1 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x8050005081000
+ Bitboard: 0b1000000001010000000000000101000010000001000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x202fd02020200
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x110a000a112000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 1 0 0
+  6  1 0 0 0 1 0 0 0
+  5  0 1 0 1 0 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  0 1 0 1 0 0 0 0
+  2  1 0 0 0 1 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x110a000a112000
+ Bitboard: 0b10001000010100000000000001010000100010010000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x404fb04040400
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x22140014224100
+
+  8  0 0 0 0 0 0 0 0
+  7  1 0 0 0 0 0 1 0
+  6  0 1 0 0 0 1 0 0
+  5  0 0 1 0 1 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  0 0 1 0 1 0 0 0
+  2  0 1 0 0 0 1 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x22140014224100
+ Bitboard: 0b100010000101000000000000010100001000100100000100000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x808f708080800
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ . === BISHOP DEBUG for square 36 ===
+  occ=0xffff00000000ffff
+  mask=0x44280028440200
+  relevant=0x44000000000200
+  magic=0x404040040100
+  shift=55
+  raw_idx=137
+  idx=137
+  result=0x40a1020c0c0200
+  direct=0x40a1020c0c0200
+  match: true
+===============================
+
+  bishopMask    : 0x40a1020c0c0200
+
+  8  0 0 0 0 0 0 0 0
+  7  0 1 0 0 0 0 0 0
+  6  0 0 1 1 0 0 0 0
+  5  0 0 1 1 0 0 0 0
+  4  0 1 0 0 0 0 0 0
+  3  1 0 0 0 0 1 0 1
+  2  0 0 0 0 0 0 1 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x40a1020c0c0200
+ Bitboard: 0b1000000101000010000001000001100000011000000001000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x1010ef10101000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x4081420418080400
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 1 0 0 0 0 0
+  6  0 0 0 1 0 0 0 0
+  5  0 0 0 1 1 0 0 0
+  4  0 0 1 0 0 0 0 0
+  3  0 1 0 0 0 0 1 0
+  2  1 0 0 0 0 0 0 1
+  1  0 0 0 0 0 0 1 0
+
+     a b c d e f g h
+
+ Bitboard: 0x4081420418080400
+ Bitboard: 0b100000010000001010000100000010000011000000010000000010000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x2020df20202000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x8102840820100800
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 1 0 0 0 0
+  6  0 0 0 0 1 0 0 0
+  5  0 0 0 0 0 1 0 0
+  4  0 0 0 1 0 0 0 0
+  3  0 0 1 0 0 0 0 1
+  2  0 1 0 0 0 0 0 0
+  1  1 0 0 0 0 0 0 1
+
+     a b c d e f g h
+
+ Bitboard: 0x8102840820100800
+ Bitboard: 0b1000000100000010100001000000100000100000000100000000100000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x4040bf40404000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x20400040201000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 1 0 0 0
+  6  0 0 0 0 0 1 0 0
+  5  0 0 0 0 0 0 1 0
+  4  0 0 0 0 0 0 0 0
+  3  0 0 0 0 0 0 1 0
+  2  0 0 0 0 0 1 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x20400040201000
+ Bitboard: 0b100000010000000000000001000000001000000001000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x80807f80808000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ . 
+  3   bishopMask    : 0x2000204081000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 1 0 0 0
+  6  0 0 0 1 0 0 0 0
+  5  0 0 1 0 0 0 0 0
+  4  0 1 0 0 0 0 0 0
+  3  0 0 0 0 0 0 0 0
+  2  0 1 0 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x2000204081000
+ Bitboard: 0b10000000000000001000000100000010000001000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x1fe0101010100
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x5000508102000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 1 0 0
+  6  0 0 0 0 1 0 0 0
+  5  0 0 0 1 0 0 0 0
+  4  1 0 1 0 0 0 0 0
+  3  0 0 0 0 0 0 0 0
+  2  1 0 1 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x5000508102000
+ Bitboard: 0b101000000000000010100001000000100000010000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x2fd0202020200
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0xa000a11204000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 0 1 0
+  6  0 0 0 0 0 1 0 0
+  5  1 0 0 0 1 0 0 0
+  4  0 1 0 1 0 0 0 0
+  3  0 0 0 0 0 0 0 0
+  2  0 1 0 1 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0xa000a11204000
+ Bitboard: 0b1010000000000000101000010001001000000100000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x4fb0404040400
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x2050810606090000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 0 0 0
+  6  1 0 0 1 0 0 0 0
+  5  0 1 1 0 0 0 0 0
+  4  0 1 1 0 0 0 0 0
+  3  1 0 0 0 0 0 0 1
+  2  0 0 0 0 1 0 1 0
+  1  0 0 0 0 0 1 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x2050810606090000
+ Bitboard: 0b10000001010000100000010000011000000110000010010000000000000000
+
+  bishopAttackers: 0x2000000000000000
+  rookMask      : 0x8f70808080800
+  rookAttackers : 0x0
+  combined attackers: 0x2000000000000000
+ X   bishopMask    : 0x40a1020c0c020100
+
+  8  0 0 0 0 0 0 0 0
+  7  1 0 0 0 0 0 0 0
+  6  0 1 0 0 0 0 0 0
+  5  0 0 1 1 0 0 0 0
+  4  0 0 1 1 0 0 0 0
+  3  0 1 0 0 0 0 0 0
+  2  1 0 0 0 0 1 0 1
+  1  0 0 0 0 0 0 1 0
+
+     a b c d e f g h
+
+ Bitboard: 0x40a1020c0c020100
+ Bitboard: 0b100000010100001000000100000110000001100000000100000000100000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x10ef1010101000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x8142041808040200
+
+  8  0 0 0 0 0 0 0 0
+  7  0 1 0 0 0 0 0 0
+  6  0 0 1 0 0 0 0 0
+  5  0 0 0 1 0 0 0 0
+  4  0 0 0 1 1 0 0 0
+  3  0 0 1 0 0 0 0 0
+  2  0 1 0 0 0 0 1 0
+  1  1 0 0 0 0 0 0 1
+
+     a b c d e f g h
+
+ Bitboard: 0x8142041808040200
+ Bitboard: 0b1000000101000010000001000001100000001000000001000000001000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x20df2020202000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0xa000a010080400
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 1 0 0 0 0 0
+  6  0 0 0 1 0 0 0 0
+  5  0 0 0 0 1 0 0 0
+  4  0 0 0 0 0 1 0 1
+  3  0 0 0 0 0 0 0 0
+  2  0 0 0 0 0 1 0 1
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0xa000a010080400
+ Bitboard: 0b10100000000000001010000000010000000010000000010000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x40bf4040404000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x40004020100800
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 1 0 0 0 0
+  6  0 0 0 0 1 0 0 0
+  5  0 0 0 0 0 1 0 0
+  4  0 0 0 0 0 0 1 0
+  3  0 0 0 0 0 0 0 0
+  2  0 0 0 0 0 0 1 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x40004020100800
+ Bitboard: 0b1000000000000000100000000100000000100000000100000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x807f8080808000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ . 
+  2   bishopMask    : 0x200020408102000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 1 0 0
+  6  0 0 0 0 1 0 0 0
+  5  0 0 0 1 0 0 0 0
+  4  0 0 1 0 0 0 0 0
+  3  0 1 0 0 0 0 0 0
+  2  0 0 0 0 0 0 0 0
+  1  0 1 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x200020408102000
+ Bitboard: 0b1000000000000000100000010000001000000100000010000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x102010101010100
+  rookAttackers : 0x100000000000000
+  combined attackers: 0x100000000000000
+ X   bishopMask    : 0x500050810204000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 0 1 0
+  6  0 0 0 0 0 1 0 0
+  5  0 0 0 0 1 0 0 0
+  4  0 0 0 1 0 0 0 0
+  3  1 0 1 0 0 0 0 0
+  2  0 0 0 0 0 0 0 0
+  1  1 0 1 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x500050810204000
+ Bitboard: 0b10100000000000001010000100000010000001000000100000000000000
+
+  bishopAttackers: 0x400000000000000
+  rookMask      : 0x205020202020200
+  rookAttackers : 0x0
+  combined attackers: 0x400000000000000
+ X   bishopMask    : 0x2840830304080000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 0 0 0
+  6  0 0 0 1 0 0 0 0
+  5  0 0 1 0 0 0 0 0
+  4  1 1 0 0 0 0 0 0
+  3  1 1 0 0 0 0 0 1
+  2  0 0 0 0 0 0 1 0
+  1  0 0 0 1 0 1 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x2840830304080000
+ Bitboard: 0b10100001000000100000110000001100000100000010000000000000000000
+
+  bishopAttackers: 0x2800000000000000
+  rookMask      : 0x40a040404040400
+  rookAttackers : 0x0
+  combined attackers: 0x2800000000000000
+ X   bishopMask    : 0x5081060609000000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 0 0 0
+  6  0 0 0 0 0 0 0 0
+  5  1 0 0 1 0 0 0 0
+  4  0 1 1 0 0 0 0 0
+  3  0 1 1 0 0 0 0 0
+  2  1 0 0 0 0 0 0 1
+  1  0 0 0 0 1 0 1 0
+
+     a b c d e f g h
+
+ Bitboard: 0x5081060609000000
+ Bitboard: 0b101000010000001000001100000011000001001000000000000000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x814080808080800
+  rookAttackers : 0x800000000000000
+  combined attackers: 0x800000000000000
+ X   bishopMask    : 0xa1020c0c02010000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 0 0 0
+  6  1 0 0 0 0 0 0 0
+  5  0 1 0 0 0 0 0 0
+  4  0 0 1 1 0 0 0 0
+  3  0 0 1 1 0 0 0 0
+  2  0 1 0 0 0 0 0 0
+  1  1 0 0 0 0 1 0 1
+
+     a b c d e f g h
+
+ Bitboard: 0xa1020c0c02010000
+ Bitboard: 0b1010000100000010000011000000110000000010000000010000000000000000
+
+  bishopAttackers: 0x2000000000000000
+  rookMask      : 0x1028101010101000
+  rookAttackers : 0x0
+  combined attackers: 0x2000000000000000
+ X   bishopMask    : 0x5000508804020100
+
+  8  0 0 0 0 0 0 0 0
+  7  1 0 0 0 0 0 0 0
+  6  0 1 0 0 0 0 0 0
+  5  0 0 1 0 0 0 0 0
+  4  0 0 0 1 0 0 0 1
+  3  0 0 0 0 1 0 1 0
+  2  0 0 0 0 0 0 0 0
+  1  0 0 0 0 1 0 1 0
+
+     a b c d e f g h
+
+ Bitboard: 0x5000508804020100
+ Bitboard: 0b101000000000000010100001000100000000100000000100000000100000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x2050202020202000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0xa000a01008040200
+
+  8  0 0 0 0 0 0 0 0
+  7  0 1 0 0 0 0 0 0
+  6  0 0 1 0 0 0 0 0
+  5  0 0 0 1 0 0 0 0
+  4  0 0 0 0 1 0 0 0
+  3  0 0 0 0 0 1 0 1
+  2  0 0 0 0 0 0 0 0
+  1  0 0 0 0 0 1 0 1
+
+     a b c d e f g h
+
+ Bitboard: 0xa000a01008040200
+ Bitboard: 0b1010000000000000101000000001000000001000000001000000001000000000
+
+  bishopAttackers: 0x2000000000000000
+  rookMask      : 0x40a0404040404000
+  rookAttackers : 0x0
+  combined attackers: 0x2000000000000000
+ X   bishopMask    : 0x4000402010080400
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 1 0 0 0 0 0
+  6  0 0 0 1 0 0 0 0
+  5  0 0 0 0 1 0 0 0
+  4  0 0 0 0 0 1 0 0
+  3  0 0 0 0 0 0 1 0
+  2  0 0 0 0 0 0 0 0
+  1  0 0 0 0 0 0 1 0
+
+     a b c d e f g h
+
+ Bitboard: 0x4000402010080400
+ Bitboard: 0b100000000000000010000000010000000010000000010000000010000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x8040808080808000
+  rookAttackers : 0x8000000000000000
+  combined attackers: 0x8000000000000000
+ X 
+  1   bishopMask    : 0x2000000000000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 0 0 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  0 0 0 0 0 0 0 0
+  2  0 1 0 0 0 0 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x2000000000000
+ Bitboard: 0b10000000000000000000000000000000000000000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x201000000000000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x2041810204080000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 0 0 0
+  6  0 0 0 1 0 0 0 0
+  5  0 0 1 0 0 0 0 0
+  4  0 1 0 0 0 0 0 0
+  3  1 0 0 0 0 0 0 1
+  2  1 0 0 0 0 0 1 0
+  1  0 0 0 0 0 1 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x2041810204080000
+ Bitboard: 0b10000001000001100000010000001000000100000010000000000000000000
+
+  bishopAttackers: 0x2000000000000000
+  rookMask      : 0x502000000000000
+  rookAttackers : 0x100000000000000
+  combined attackers: 0x2100000000000000
+ X   bishopMask    : 0x4083020408000000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 0 0 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 1 0 0 0 0
+  4  0 0 1 0 0 0 0 0
+  3  0 1 0 0 0 0 0 0
+  2  1 1 0 0 0 0 0 1
+  1  0 0 0 0 0 0 1 0
+
+     a b c d e f g h
+
+ Bitboard: 0x4083020408000000
+ Bitboard: 0b100000010000011000000100000010000001000000000000000000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0xa04000000000000
+  rookAttackers : 0x800000000000000
+  combined attackers: 0x800000000000000
+ X   bishopMask    : 0x8106040800000000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 0 0 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 0 1 0 0 0 0
+  3  0 0 1 0 0 0 0 0
+  2  0 1 1 0 0 0 0 0
+  1  1 0 0 0 0 0 0 1
+
+     a b c d e f g h
+
+ Bitboard: 0x8106040800000000
+ Bitboard: 0b1000000100000110000001000000100000000000000000000000000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x1408000000000000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0x28000000000000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 0 0 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  0 0 0 0 0 0 0 0
+  2  0 0 0 1 0 1 0 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x28000000000000
+ Bitboard: 0b101000000000000000000000000000000000000000000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x2810000000000000
+  rookAttackers : 0x800000000000000
+  combined attackers: 0x800000000000000
+ X   bishopMask    : 0x50000000000000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 0 0 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  0 0 0 0 0 0 0 0
+  2  0 0 0 0 1 0 1 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x50000000000000
+ Bitboard: 0b1010000000000000000000000000000000000000000000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x5020000000000000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ .   bishopMask    : 0xa0000000000000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 0 0 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  0 0 0 0 0 0 0 0
+  2  0 0 0 0 0 1 0 1
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0xa0000000000000
+ Bitboard: 0b10100000000000000000000000000000000000000000000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0xa040000000000000
+  rookAttackers : 0x8000000000000000
+  combined attackers: 0x8000000000000000
+ X   bishopMask    : 0x40000000000000
+
+  8  0 0 0 0 0 0 0 0
+  7  0 0 0 0 0 0 0 0
+  6  0 0 0 0 0 0 0 0
+  5  0 0 0 0 0 0 0 0
+  4  0 0 0 0 0 0 0 0
+  3  0 0 0 0 0 0 0 0
+  2  0 0 0 0 0 0 1 0
+  1  0 0 0 0 0 0 0 0
+
+     a b c d e f g h
+
+ Bitboard: 0x40000000000000
+ Bitboard: 0b1000000000000000000000000000000000000000000000000000000
+
+  bishopAttackers: 0x0
+  rookMask      : 0x4080000000000000
+  rookAttackers : 0x0
+  combined attackers: 0x0
+ . 
+
+   a  b  c  d  e  f  g  h
+
+=== end attacked squares ===

From ccf0c8121f427a08126ab82244aa1c6aa1abab79 Mon Sep 17 00:00:00 2001
From: Jakob <jakob.dekleva@gmail.com>
Date: Thu, 12 Jun 2025 14:27:25 +0200
Subject: [PATCH 4/8] test: verifying GPG signature setup

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 340c3ea..e2ee939 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ This chess engine is still in development. When I have it in working order and w
 
 ## Strength
 
-**TODO:**
+**TODO :**
 
 - Update the strength table:
 

From e40d2dfcaaa42f7b8ee94fd1444ee9c1506b4adc Mon Sep 17 00:00:00 2001
From: Jakob <jakob.dekleva@gmail.com>
Date: Thu, 12 Jun 2025 14:46:11 +0200
Subject: [PATCH 5/8] test: verifying GPG signature setup


From d57e28cbd1e4f462e8c8a1305f53073aeaf01733 Mon Sep 17 00:00:00 2001
From: Jakob <jakob.dekleva@gmail.com>
Date: Mon, 16 Jun 2025 14:49:14 +0200
Subject: [PATCH 6/8] Chore: use a difretn methode for bishop attacks

---
 src/attacks.zig         |  102 ++-
 src/bitboard.zig        |  148 ++---
 src/main.zig            |    4 +-
 src/move_generation.zig |    4 +
 src/test.zig            |    1 +
 src/types.zig           |   27 +-
 temp.txt                | 1390 ---------------------------------------
 7 files changed, 161 insertions(+), 1515 deletions(-)
 delete mode 100644 temp.txt

diff --git a/src/attacks.zig b/src/attacks.zig
index f5a79be..9c23189 100644
--- a/src/attacks.zig
+++ b/src/attacks.zig
@@ -1,9 +1,10 @@
+const print = std.debug.print;
 const types = @import("types.zig");
 const std = @import("std");
-const print = std.debug.print;
 const tabele = @import("tabeles.zig");
 const util = @import("util.zig");
 const bitboard = @import("bitboard.zig");
+
 // generate knight attacks tabele
 pub inline fn knight_attacks_from_bitboard(bb: types.Bitboard) types.Bitboard {
     return (((bb << 17) & ~@intFromEnum(types.MaskFile.AFILE)) |
@@ -198,7 +199,10 @@ pub inline fn init_rook_attackes() void {
             var idx64: u64 = @as(u64, subset) *% magic;
             idx64 = idx64 >> shift;
             const idx: usize = @intCast(idx64);
-            Rook_attacks[square][idx] = get_rook_attacks_for_init(sq6, subset);
+            Rook_attacks[square][idx] = get_rook_attacks_for_init(
+                sq6,
+                subset,
+            );
             if (subset == 0) break;
             subset = (subset - 1) & mask;
         }
@@ -212,18 +216,63 @@ pub inline fn get_rook_attacks(square: u6, occ: u64) u64 {
     const relevant: u64 = occ & mask;
     const idx: usize = @intCast((relevant *% magic) >> shift);
 
-    // const result = Rook_attacks[square][idx];
-    //
-    // std.debug.print("LOOKUP sq={} mask=0x{x} occ&mask=0x{x}\n", .{ square, mask, relevant });
-    // std.debug.print("       magic=0x{x} shift={} → idx={} → result=0x{x}\n\n", .{ magic, shift, idx, result });
-    //
-    // bitboard.print_board(result);
-    //
     return Rook_attacks[square][idx];
 }
 
-pub inline fn get_bishop_attacks_for_init(square: u8, occ: u64) u64 {
-    return get_bishop_attacks_for_init(square, occ);
+// Correct on-the-fly attack generation for bishops using simple ray-casting.
+// This is a one-time cost at initialization.
+pub fn get_bishop_attacks_for_init(square: u8, blockers: u64) u64 {
+    var attacks: u64 = 0;
+    const r: i8 = @intCast(square / 8);
+    const f: i8 = @intCast(square % 8);
+    const one: u64 = 1;
+
+    // North-East
+    var cr = r + 1;
+    var cf = f + 1;
+    while (cr <= 7 and cf <= 7) : ({
+        cr += 1;
+        cf += 1;
+    }) {
+        const s = cr * 8 + cf;
+        attacks |= (one << @intCast(s));
+        if ((blockers & (one << @intCast(s))) != 0) break;
+    }
+    // South-West
+    cr = r - 1;
+    cf = f - 1;
+    while (cr >= 0 and cf >= 0) : ({
+        cr -= 1;
+        cf -= 1;
+    }) {
+        const s = cr * 8 + cf;
+        attacks |= (one << @intCast(s));
+        if ((blockers & (one << @intCast(s))) != 0) break;
+    }
+    // North-West
+    cr = r + 1;
+    cf = f - 1;
+    while (cr <= 7 and cf >= 0) : ({
+        cr += 1;
+        cf -= 1;
+    }) {
+        const s = cr * 8 + cf;
+        attacks |= (one << @intCast(s));
+        if ((blockers & (one << @intCast(s))) != 0) break;
+    }
+    // South-East
+    cr = r - 1;
+    cf = f + 1;
+    while (cr >= 0 and cf <= 7) : ({
+        cr -= 1;
+        cf += 1;
+    }) {
+        const s = cr * 8 + cf;
+        attacks |= (one << @intCast(s));
+        if ((blockers & (one << @intCast(s))) != 0) break;
+    }
+
+    return attacks;
 }
 
 //  bishop magice Bitboards
@@ -247,11 +296,24 @@ pub inline fn init_bishop_attackes() void {
             idx64 = idx64 >> shift;
             const idx: usize = @intCast(idx64);
 
-            const correct_attacks = get_bishop_attacks_for_init(sq6, subset);
+            const correct_attacks = get_bishop_attacks_for_init(
+                sq6,
+                subset,
+            );
 
             // Check for collision
-            if (Bishop_attacks[square][idx] != 0 and Bishop_attacks[square][idx] != correct_attacks) {
-                std.debug.panic("Magic collision detected for bishop square {} at index {}: existing=0x{x}, new=0x{x}\n", .{ square, idx, Bishop_attacks[square][idx], correct_attacks });
+            if (Bishop_attacks[square][idx] != 0 and
+                Bishop_attacks[square][idx] != correct_attacks)
+            {
+                std.debug.panic(
+                    "Magic collision detected for bishop square {} at index {}: existing=0x{x}, new=0x{x}\n",
+                    .{
+                        square,
+                        idx,
+                        Bishop_attacks[square][idx],
+                        correct_attacks,
+                    },
+                );
             }
 
             Bishop_attacks[square][idx] = correct_attacks;
@@ -267,17 +329,21 @@ pub inline fn get_bishop_attacks(square: u6, occ: u64) u64 {
     const magic: u64 = tabele.bishop_magics[square];
     const shift: u6 = @intCast(64 - tabele.Bishop_index_bit[square]);
     const relevant: u64 = occ & mask;
-    const raw_idx: u64 = (relevant *% magic) >> shift;
-    const idx: usize = @intCast(raw_idx);
+    const idx: usize = @intCast((relevant *% magic) >> shift);
     return Bishop_attacks[square][idx];
 }
 
 pub inline fn get_queen_attacks(square: u6, occ: u64) u64 {
-    const queen_attacks: u64 = get_bishop_attacks(square, occ) | get_rook_attacks(square, occ);
+    const queen_attacks: u64 = get_bishop_attacks(square, occ) |
+        get_rook_attacks(square, occ);
     return queen_attacks;
 }
 
-pub fn piece_attacks(square: u6, occ: u64, comptime Piece: types.PieceType) types.Bitboard {
+pub fn piece_attacks(
+    square: u6,
+    occ: u64,
+    comptime Piece: types.PieceType,
+) types.Bitboard {
     if (Piece != types.PieceType.Pawn) {
         return switch (Piece) {
             types.PieceType.Bishop => get_bishop_attacks(square, occ),
diff --git a/src/bitboard.zig b/src/bitboard.zig
index c4b2a5d..d66c9a7 100644
--- a/src/bitboard.zig
+++ b/src/bitboard.zig
@@ -58,15 +58,6 @@ pub fn print_unicode_board(board: types.Board) void {
     print(" Bitboard: 0b{b}\n\n", .{board.pieces_combined()});
 }
 
-// TODO fix bug on the whitte side
-//  7  .  .  .  .  .  .  .  .
-// 7  .  .  .  .  .  .  .  X
-// 6  .  .  .  .  .  .  X  .
-// 5  .  .  .  .  .  X  .  .
-// 4  .  .  .  .  .  .  .  .
-// 3  X  X  X  X  X  X  X  X
-// 2  X  X  X  X  X  X  X  X
-// 1  .  X  X  X  X  X  X  .
 pub fn print_attacked_squares(board: *types.Board) void {
     const occ = board.pieces_combined();
     const bbs = board.pieces;
@@ -104,101 +95,78 @@ pub fn print_attacked_squares(board: *types.Board) void {
     print("\n   a  b  c  d  e  f  g  h\n", .{});
 }
 
-pub fn debug_bishop_attack(square: u6, occ: u64) void {
-    const mask = tables.Bishops_attackes_tabele[square];
-    const magic = tables.bishop_magics[square];
-    const relevantBits = tables.Bishop_index_bit[square];
-    const shift: u6 = @intCast(64 - relevantBits);
-    const relevant = occ & mask;
-    const raw_idx = (relevant *% magic) >> shift;
-    const idx: usize = @intCast(raw_idx);
-    const result = attacks.Bishop_attacks[square][idx];
-
-    std.debug.print("=== BISHOP DEBUG for square {} ===\n", .{square});
-    std.debug.print("  occ=0x{x}\n", .{occ});
-    std.debug.print("  mask=0x{x}\n", .{mask});
-    std.debug.print("  relevant=0x{x}\n", .{relevant});
-    std.debug.print("  magic=0x{x}\n", .{magic});
-    std.debug.print("  shift={}\n", .{shift});
-    std.debug.print("  raw_idx={}\n", .{raw_idx});
-    std.debug.print("  idx={}\n", .{idx});
-    std.debug.print("  result=0x{x}\n", .{result});
-
-    // Compare with direct calculation
-    const direct = attacks.get_bishop_attacks_for_init(@intCast(square), occ);
-    std.debug.print("  direct=0x{x}\n", .{direct});
-    std.debug.print("  match: {}\n", .{result == direct});
-    std.debug.print("===============================\n\n", .{});
-}
-
 pub fn is_square_attacked(
+    board: *const types.Board,
     square: u6,
-    by: types.Color,
-    board: types.Board,
+    by_side: types.Color,
 ) bool {
-    const occAll = board.pieces_combined();
-
-    if (square == 15 or square == 22 or square == 29 or square == 36) { // a8 for example, or pick any square showing wrong results
-        debug_bishop_attack(square, occAll);
-    }
-
-    // Bishop/Queen attackers (diagonals)
-    const bishopMask = attacks.get_bishop_attacks(square, occAll);
-    const bishopAttackers = bishopMask & (board.pieces[
-        if (by == .White)
-            types.Piece.WHITE_BISHOP.toU4()
-        else
-            types.Piece.BLACK_BISHOP.toU4()
-    ] | board.pieces[
-        if (by == .White)
-            types.Piece.WHITE_QUEEN.toU4()
-        else
-            types.Piece.BLACK_QUEEN.toU4()
-    ]);
-    std.debug.print("  bishopMask    : 0x{x}\n", .{bishopMask});
-    print_board(bishopMask);
-    std.debug.print("  bishopAttackers: 0x{x}\n", .{bishopAttackers});
+    const occ = board.pieces_combined();
+    const bbs = board.pieces;
 
-    // Rook/Queen attackers (ranks & files)
-    const rookMask = attacks.get_rook_attacks(square, occAll);
-    const rookAttackers = rookMask & (board.pieces[
-        if (by == .White)
-            types.Piece.WHITE_ROOK.toU4()
-        else
-            types.Piece.BLACK_ROOK.toU4()
-    ] | board.pieces[
-        if (by == .White)
-            types.Piece.WHITE_QUEEN.toU4()
-        else
-            types.Piece.BLACK_QUEEN.toU4()
-    ]);
-    std.debug.print("  rookMask      : 0x{x}\n", .{rookMask});
-    std.debug.print("  rookAttackers : 0x{x}\n", .{rookAttackers});
+    return switch (by_side) {
+        .White => {
+            // Pawns (reverse attack to find attacker)
+            if ((attacks.pawn_attacks_from_square(square, .Black) &
+                bbs[@intFromEnum(types.Piece.WHITE_PAWN)]) != 0) return true;
+            // Knights
+            if ((attacks.piece_attacks(square, occ, .Knight) &
+                bbs[@intFromEnum(types.Piece.WHITE_KNIGHT)]) != 0) return true;
+            // King
+            if ((attacks.piece_attacks(square, occ, .King) &
+                bbs[@intFromEnum(types.Piece.WHITE_KING)]) != 0) return true;
+            // Bishops & Queens (diagonal)
+            if ((attacks.piece_attacks(square, occ, .Bishop) &
+                (bbs[@intFromEnum(types.Piece.WHITE_BISHOP)] |
+                    bbs[@intFromEnum(types.Piece.WHITE_QUEEN)])) != 0) return true;
+            // Rooks & Queens (orthogonal)
+            if ((attacks.piece_attacks(square, occ, .Rook) &
+                (bbs[@intFromEnum(types.Piece.WHITE_ROOK)] |
+                    bbs[@intFromEnum(types.Piece.WHITE_QUEEN)])) != 0) return true;
 
-    // Combine all attackers
-    const attackers = bishopAttackers | rookAttackers;
-    std.debug.print("  combined attackers: 0x{x}\n", .{attackers});
+            return false;
+        },
+        .Black => {
+            // Pawns (reverse attack to find attacker)
+            if ((attacks.pawn_attacks_from_square(square, .White) &
+                bbs[@intFromEnum(types.Piece.BLACK_PAWN)]) != 0) return true;
+            // Knights
+            if ((attacks.piece_attacks(square, occ, .Knight) &
+                bbs[@intFromEnum(types.Piece.BLACK_KNIGHT)]) != 0) return true;
+            // King
+            if ((attacks.piece_attacks(square, occ, .King) &
+                bbs[@intFromEnum(types.Piece.BLACK_KING)]) != 0) return true;
+            // Bishops & Queens (diagonal)
+            if ((attacks.piece_attacks(square, occ, .Bishop) &
+                (bbs[@intFromEnum(types.Piece.BLACK_BISHOP)] |
+                    bbs[@intFromEnum(types.Piece.BLACK_QUEEN)])) != 0) return true;
+            // Rooks & Queens (orthogonal)
+            if ((attacks.piece_attacks(square, occ, .Rook) &
+                (bbs[@intFromEnum(types.Piece.BLACK_ROOK)] |
+                    bbs[@intFromEnum(types.Piece.BLACK_QUEEN)])) != 0) return true;
 
-    return attackers != 0;
+            return false;
+        },
+        .both => unreachable,
+    };
 }
 
-pub fn print_attacked_squares_new(board: types.Board) void {
-    const side = board.side;
-
-    std.debug.print("=== attacked squares for side: {} ===\n", .{side});
+// This function is now much cleaner and uses the new is_square_attacked function.
+pub fn print_attacked_squares_new(board: *types.Board) void {
     print("\n", .{});
-    for (0..8) |r| {
-        print("  {} ", .{8 - r});
-        for (0..8) |c| {
-            const sq: u6 = @intCast(r * 8 + c);
-            const attacked = is_square_attacked(sq, side, board);
+    print("--- Attacked squares for side: {} ---\n", .{board.side});
+
+    for (0..8) |rank| {
+        print("  {} ", .{8 - rank});
+        for (0..8) |file| {
+            const square: u6 = @intCast(rank * 8 + file);
+            const attacked = is_square_attacked(board, square, board.side);
             const ch: u8 = if (attacked) 'X' else '.';
             print(" {c} ", .{ch});
         }
         print("\n", .{});
     }
-    print("\n   a  b  c  d  e  f  g  h\n\n", .{});
-    std.debug.print("=== end attacked squares ===\n", .{});
+
+    print("\n   a  b  c  d  e  f  g  h\n", .{});
 }
 
 pub const FenError = error{
diff --git a/src/main.zig b/src/main.zig
index afaa77a..55859cc 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -15,9 +15,7 @@ pub fn main() !void {
     const bb = b.pieces_combined();
     print("Occupancy (hex): 0x{x}\n", .{bb});
 
-    bitboard.print_unicode_board(b);
     b.side = types.Color.White;
-    bitboard.print_unicode_board(b);
     bitboard.print_attacked_squares(&b);
-    bitboard.print_attacked_squares_new(b);
+    bitboard.print_attacked_squares_new(&b);
 }
diff --git a/src/move_generation.zig b/src/move_generation.zig
index 0237d69..ec35dea 100644
--- a/src/move_generation.zig
+++ b/src/move_generation.zig
@@ -15,5 +15,9 @@ pub const Move = struct {
 };
 
 pub fn generate_moves(list: *lists.MoveList) void {
+    const us = types.Board.side; // side to move
+    const them = if (types.Board.side == .white) .black else .white;
+    _ = us;
+    _ = them;
     _ = list;
 }
diff --git a/src/test.zig b/src/test.zig
index 7d4aa33..ff1db05 100644
--- a/src/test.zig
+++ b/src/test.zig
@@ -16,6 +16,7 @@ test "test print bitboard" {
 test "test print bitboard unicode" {
     var b: types.Board = .{
         .pieces = [_]types.Bitboard{0} ** types.Board.PieceCount,
+        .board = undefined,
         .side = types.Color.Black,
         .enpassant = types.square.e3,
         .castle = @intFromEnum(types.Castle.WK) | @intFromEnum(types.Castle.WQ) | @intFromEnum(types.Castle.BK) | @intFromEnum(types.Castle.BQ),
diff --git a/src/types.zig b/src/types.zig
index 7dbd07a..38a11b2 100644
--- a/src/types.zig
+++ b/src/types.zig
@@ -115,16 +115,16 @@ pub const MoveFlags = enum(u4) {
     CAPTURE = 0b1000, // 8
     CAPTURES = 0b1011, // 11
     EN_PASSANT = 0b1010, // 10
-    
+
     // Promotions (no capture)
     PR_KNIGHT = 0b0100, // 4
     PR_BISHOP = 0b0101, // 5
-    PR_ROOK =   0b0110, // 6
-    PR_QUEEN =  0b0111, // 7
+    PR_ROOK = 0b0110, // 6
+    PR_QUEEN = 0b0111, // 7
     PC_KNIGHT = 0b1100, // 12
     PC_BISHOP = 0b1101, // 13
-    PC_ROOK =   0b1110, // 14
-    PC_QUEEN =  0b1111, // 15
+    PC_ROOK = 0b1110, // 14
+    PC_QUEEN = 0b1111, // 15
 };
 
 pub const Castle = enum(u8) {
@@ -138,10 +138,11 @@ pub const Board = struct {
     pub const PieceCount = @intFromEnum(Piece.NO_PIECE) + 1;
 
     pieces: [PieceCount]Bitboard,
+    board: [64]Piece,
     side: Color,
     enpassant: square,
     castle: u8, // bitmask of Castle.*
-                
+
     pub fn pieces_combined(self: *const Board) Bitboard {
         var bb: Bitboard = 0;
         for (self.pieces) |p| bb |= p;
@@ -151,30 +152,28 @@ pub const Board = struct {
     pub fn new() Board {
         var b: Board = undefined;
 
-        @memset(b.pieces[0..],0);
+        @memset(b.pieces[0..], 0);
 
         b.side = Color.White;
         b.enpassant = square.NO_SQUARE;
         b.castle = 0;
-        return b; 
+        return b;
     }
 
-    pub inline fn set_pieces(self: *Board, comptime c: Color) Bitboard{
+    pub inline fn set_pieces(self: *Board, comptime c: Color) Bitboard {
         return if (c == Color.White) self.pieces[Piece.WHITE_PAWN.toU4()] * 8 | self.pieces[Piece.WHITE_KNIGHT.toU4()] | self.pieces[Piece.WHITE_BISHOP.toU4()] | self.pieces[Piece.WHITE_QUEEN.toU4()] | self.pieces[Piece.WHITE_KING.toU4()] else
-        self.pieces[Piece.BLACK_PAWN.toU4()] * 8 | self.pieces[Piece.BLACK_KNIGHT.toU4()] | self.pieces[Piece.BLACK_BISHOP.toU4()] | self.pieces[Piece.BLACK_QUEEN.toU4()] | self.pieces[Piece.BLACK_KING.toU4()];
-
+            self.pieces[Piece.BLACK_PAWN.toU4()] * 8 | self.pieces[Piece.BLACK_KNIGHT.toU4()] | self.pieces[Piece.BLACK_BISHOP.toU4()] | self.pieces[Piece.BLACK_QUEEN.toU4()] | self.pieces[Piece.BLACK_KING.toU4()];
     }
 
     pub inline fn set_white(self: *Board) Bitboard {
-        return  self.pieces[Piece.WHITE_PAWN.toU4()] * 8 | self.pieces[Piece.WHITE_KNIGHT.toU4()] | self.pieces[Piece.WHITE_BISHOP.toU4()] | self.pieces[Piece.WHITE_QUEEN.toU4()] | self.pieces[Piece.WHITE_KING.toU4()]; 
+        return self.pieces[Piece.WHITE_PAWN.toU4()] * 8 | self.pieces[Piece.WHITE_KNIGHT.toU4()] | self.pieces[Piece.WHITE_BISHOP.toU4()] | self.pieces[Piece.WHITE_QUEEN.toU4()] | self.pieces[Piece.WHITE_KING.toU4()];
     }
 
     pub inline fn set_black(self: *Board) Bitboard {
-        return  self.pieces[Piece.BLACK_PAWN.toU4()] * 8 | self.pieces[Piece.BLACK_KNIGHT.toU4()] | self.pieces[Piece.BLACK_BISHOP.toU4()] | self.pieces[Piece.BLACK_QUEEN.toU4()] | self.pieces[Piece.BLACK_KING.toU4()];
+        return self.pieces[Piece.BLACK_PAWN.toU4()] * 8 | self.pieces[Piece.BLACK_KNIGHT.toU4()] | self.pieces[Piece.BLACK_BISHOP.toU4()] | self.pieces[Piece.BLACK_QUEEN.toU4()] | self.pieces[Piece.BLACK_KING.toU4()];
     }
 };
 
-
 // Attacking directions for the pieces
 pub const Direction = enum(i32) {
     North = 8,
diff --git a/temp.txt b/temp.txt
deleted file mode 100644
index 655ebd2..0000000
--- a/temp.txt
+++ /dev/null
@@ -1,1390 +0,0 @@
-Occupancy (hex): 0xffff00000000ffff
-
-  8  ♖ ♘ ♗ ♕ ♔ ♗ ♘ ♖
-  7  ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙
-  6  . . . . . . . .
-  5  . . . . . . . .
-  4  . . . . . . . .
-  3  . . . . . . . .
-  2  ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎
-  1  ♜ ♞ ♝ ♛ ♚ ♝ ♞ ♜
-
-     a b c d e f g h
-
- Side: White
- Bitboard: 0xffff00000000ffff
- Bitboard: 0b1111111111111111000000000000000000000000000000001111111111111111
-
-
-  8  ♖ ♘ ♗ ♕ ♔ ♗ ♘ ♖
-  7  ♙ ♙ ♙ ♙ ♙ ♙ ♙ ♙
-  6  . . . . . . . .
-  5  . . . . . . . .
-  4  . . . . . . . .
-  3  . . . . . . . .
-  2  ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎
-  1  ♜ ♞ ♝ ♛ ♚ ♝ ♞ ♜
-
-     a b c d e f g h
-
- Side: White
- Bitboard: 0xffff00000000ffff
- Bitboard: 0b1111111111111111000000000000000000000000000000001111111111111111
-
-
-  8  .  .  .  .  .  .  .  . 
-  7  .  .  .  .  .  .  .  X 
-  6  .  .  .  .  .  .  X  . 
-  5  .  .  .  .  .  X  .  . 
-  4  .  .  .  .  .  .  .  . 
-  3  X  .  X  X  .  X  .  X 
-  2  X  X  X  X  X  X  X  X 
-  1  X  X  X  X  X  X  X  X 
-
-   a  b  c  d  e  f  g  h
-=== attacked squares for side: types.Color.White ===
-
-  8   bishopMask    : 0x200
-
-  8  0 0 0 0 0 0 0 0
-  7  0 1 0 0 0 0 0 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  0 0 0 0 0 0 0 0
-  2  0 0 0 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x200
- Bitboard: 0b1000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x102
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x500
-
-  8  0 0 0 0 0 0 0 0
-  7  1 0 1 0 0 0 0 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  0 0 0 0 0 0 0 0
-  2  0 0 0 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x500
- Bitboard: 0b10100000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x205
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0xa00
-
-  8  0 0 0 0 0 0 0 0
-  7  0 1 0 1 0 0 0 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  0 0 0 0 0 0 0 0
-  2  0 0 0 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0xa00
- Bitboard: 0b101000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x40a
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x1400
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 1 0 1 0 0 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  0 0 0 0 0 0 0 0
-  2  0 0 0 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x1400
- Bitboard: 0b1010000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x814
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x2800
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 1 0 1 0 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  0 0 0 0 0 0 0 0
-  2  0 0 0 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x2800
- Bitboard: 0b10100000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x1028
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x5000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 1 0 1 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  0 0 0 0 0 0 0 0
-  2  0 0 0 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x5000
- Bitboard: 0b101000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x2050
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0xa000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 1 0 1
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  0 0 0 0 0 0 0 0
-  2  0 0 0 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0xa000
- Bitboard: 0b1010000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x40a0
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x4000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 0 1 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  0 0 0 0 0 0 0 0
-  2  0 0 0 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x4000
- Bitboard: 0b100000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x8040
-  rookAttackers : 0x0
-  combined attackers: 0x0
- . 
-  7   bishopMask    : 0x20100804020002
-
-  8  0 1 0 0 0 0 0 0
-  7  0 0 0 0 0 0 0 0
-  6  0 1 0 0 0 0 0 0
-  5  0 0 1 0 0 0 0 0
-  4  0 0 0 1 0 0 0 0
-  3  0 0 0 0 1 0 0 0
-  2  0 0 0 0 0 1 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x20100804020002
- Bitboard: 0b100000000100000000100000000100000000100000000000000010
-
-  bishopAttackers: 0x0
-  rookMask      : 0x1010101010201
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x40201008050005
-
-  8  1 0 1 0 0 0 0 0
-  7  0 0 0 0 0 0 0 0
-  6  1 0 1 0 0 0 0 0
-  5  0 0 0 1 0 0 0 0
-  4  0 0 0 0 1 0 0 0
-  3  0 0 0 0 0 1 0 0
-  2  0 0 0 0 0 0 1 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x40201008050005
- Bitboard: 0b1000000001000000001000000001000000001010000000000000101
-
-  bishopAttackers: 0x0
-  rookMask      : 0x2020202020502
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x804020110a000a
-
-  8  0 1 0 1 0 0 0 0
-  7  0 0 0 0 0 0 0 0
-  6  0 1 0 1 0 0 0 0
-  5  1 0 0 0 1 0 0 0
-  4  0 0 0 0 0 1 0 0
-  3  0 0 0 0 0 0 1 0
-  2  0 0 0 0 0 0 0 1
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x804020110a000a
- Bitboard: 0b10000000010000000010000000010001000010100000000000001010
-
-  bishopAttackers: 0x0
-  rookMask      : 0x4040404040a04
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x804122140014
-
-  8  0 0 1 0 1 0 0 0
-  7  0 0 0 0 0 0 0 0
-  6  0 0 1 0 1 0 0 0
-  5  0 1 0 0 0 1 0 0
-  4  1 0 0 0 0 0 1 0
-  3  0 0 0 0 0 0 0 1
-  2  0 0 0 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x804122140014
- Bitboard: 0b100000000100000100100010000101000000000000010100
-
-  bishopAttackers: 0x0
-  rookMask      : 0x8080808081408
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x18244280028
-
-  8  0 0 0 1 0 1 0 0
-  7  0 0 0 0 0 0 0 0
-  6  0 0 0 1 0 1 0 0
-  5  0 0 1 0 0 0 1 0
-  4  0 1 0 0 0 0 0 1
-  3  1 0 0 0 0 0 0 0
-  2  0 0 0 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x18244280028
- Bitboard: 0b11000001001000100001010000000000000101000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x10101010102810
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x1020488500050
-
-  8  0 0 0 0 1 0 1 0
-  7  0 0 0 0 0 0 0 0
-  6  0 0 0 0 1 0 1 0
-  5  0 0 0 1 0 0 0 1
-  4  0 0 1 0 0 0 0 0
-  3  0 1 0 0 0 0 0 0
-  2  1 0 0 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x1020488500050
- Bitboard: 0b1000000100000010010001000010100000000000001010000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x20202020205020
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x2040810a000a0
-
-  8  0 0 0 0 0 1 0 1
-  7  0 0 0 0 0 0 0 0
-  6  0 0 0 0 0 1 0 1
-  5  0 0 0 0 1 0 0 0
-  4  0 0 0 1 0 0 0 0
-  3  0 0 1 0 0 0 0 0
-  2  0 1 0 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x2040810a000a0
- Bitboard: 0b10000001000000100000010000101000000000000010100000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x4040404040a040
-  rookAttackers : 0x0
-  combined attackers: 0x0
- . === BISHOP DEBUG for square 15 ===
-  occ=0xffff00000000ffff
-  mask=0x4081020400000
-  relevant=0x4000000000000
-  magic=0x2082082000
-  shift=59
-  raw_idx=16
-  idx=16
-  result=0x2040810204080040
-  direct=0x40810204080040
-  match: false
-===============================
-
-  bishopMask    : 0x2040810204080040
-
-  8  0 0 0 0 0 0 1 0
-  7  0 0 0 0 0 0 0 0
-  6  0 0 0 1 0 0 0 0
-  5  0 0 1 0 0 0 0 0
-  4  0 1 0 0 0 0 0 0
-  3  1 0 0 0 0 0 0 1
-  2  0 0 0 0 0 0 1 0
-  1  0 0 0 0 0 1 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x2040810204080040
- Bitboard: 0b10000001000000100000010000001000000100000010000000000001000000
-
-  bishopAttackers: 0x2000000000000000
-  rookMask      : 0x80808080804080
-  rookAttackers : 0x0
-  combined attackers: 0x2000000000000000
- X 
-  6   bishopMask    : 0x10080402000200
-
-  8  0 0 0 0 0 0 0 0
-  7  0 1 0 0 0 0 0 0
-  6  0 0 0 0 0 0 0 0
-  5  0 1 0 0 0 0 0 0
-  4  0 0 1 0 0 0 0 0
-  3  0 0 0 1 0 0 0 0
-  2  0 0 0 0 1 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x10080402000200
- Bitboard: 0b10000000010000000010000000010000000000000001000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x1010101fe0100
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x20100805000500
-
-  8  0 0 0 0 0 0 0 0
-  7  1 0 1 0 0 0 0 0
-  6  0 0 0 0 0 0 0 0
-  5  1 0 1 0 0 0 0 0
-  4  0 0 0 1 0 0 0 0
-  3  0 0 0 0 1 0 0 0
-  2  0 0 0 0 0 1 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x20100805000500
- Bitboard: 0b100000000100000000100000000101000000000000010100000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x2020202fd0200
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x4020110a000a00
-
-  8  0 0 0 0 0 0 0 0
-  7  0 1 0 1 0 0 0 0
-  6  0 0 0 0 0 0 0 0
-  5  0 1 0 1 0 0 0 0
-  4  1 0 0 0 1 0 0 0
-  3  0 0 0 0 0 1 0 0
-  2  0 0 0 0 0 0 1 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x4020110a000a00
- Bitboard: 0b1000000001000000001000100001010000000000000101000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x4040404fb0400
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x80412214001400
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 1 0 1 0 0 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 1 0 1 0 0 0
-  4  0 1 0 0 0 1 0 0
-  3  1 0 0 0 0 0 1 0
-  2  0 0 0 0 0 0 0 1
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x80412214001400
- Bitboard: 0b10000000010000010010001000010100000000000001010000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x8080808f70800
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x1824428002800
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 1 0 1 0 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 1 0 1 0 0
-  4  0 0 1 0 0 0 1 0
-  3  0 1 0 0 0 0 0 1
-  2  1 0 0 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x1824428002800
- Bitboard: 0b1100000100100010000101000000000000010100000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x10101010ef1000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x2048850005000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 1 0 1 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 0 1 0 1 0
-  4  0 0 0 1 0 0 0 1
-  3  0 0 1 0 0 0 0 0
-  2  0 1 0 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x2048850005000
- Bitboard: 0b10000001001000100001010000000000000101000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x20202020df2000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- . === BISHOP DEBUG for square 22 ===
-  occ=0xffff00000000ffff
-  mask=0x4081020002000
-  relevant=0x4000000002000
-  magic=0x400082082000
-  shift=59
-  raw_idx=17
-  idx=17
-  result=0x2040810284082000
-  direct=0x40810284082000
-  match: false
-===============================
-
-  bishopMask    : 0x2040810284082000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 1 0 0
-  6  0 0 0 1 0 0 0 0
-  5  0 0 1 0 0 0 0 1
-  4  0 1 0 0 0 0 0 0
-  3  1 0 0 0 0 0 0 1
-  2  0 0 0 0 0 0 1 0
-  1  0 0 0 0 0 1 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x2040810284082000
- Bitboard: 0b10000001000000100000010000001010000100000010000010000000000000
-
-  bishopAttackers: 0x2000000000000000
-  rookMask      : 0x40404040bf4000
-  rookAttackers : 0x0
-  combined attackers: 0x2000000000000000
- X   bishopMask    : 0x4081020408004000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 0 1 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 1 0 0 0 0
-  4  0 0 1 0 0 0 0 0
-  3  0 1 0 0 0 0 0 0
-  2  1 0 0 0 0 0 0 1
-  1  0 0 0 0 0 0 1 0
-
-     a b c d e f g h
-
- Bitboard: 0x4081020408004000
- Bitboard: 0b100000010000001000000100000010000001000000000000100000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x808080807f8000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- . 
-  5   bishopMask    : 0x8040200020400
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 1 0 0 0 0 0
-  6  0 1 0 0 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 1 0 0 0 0 0 0
-  3  0 0 1 0 0 0 0 0
-  2  0 0 0 1 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x8040200020400
- Bitboard: 0b1000000001000000001000000000000000100000010000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x10101fe010100
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x10080500050800
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 1 0 0 0 0
-  6  1 0 1 0 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  1 0 1 0 0 0 0 0
-  3  0 0 0 1 0 0 0 0
-  2  0 0 0 0 1 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x10080500050800
- Bitboard: 0b10000000010000000010100000000000001010000100000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x20202fd020200
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x20110a000a1100
-
-  8  0 0 0 0 0 0 0 0
-  7  1 0 0 0 1 0 0 0
-  6  0 1 0 1 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 1 0 1 0 0 0 0
-  3  1 0 0 0 1 0 0 0
-  2  0 0 0 0 0 1 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x20110a000a1100
- Bitboard: 0b100000000100010000101000000000000010100001000100000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x40404fb040400
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x41221400142200
-
-  8  0 0 0 0 0 0 0 0
-  7  0 1 0 0 0 1 0 0
-  6  0 0 1 0 1 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 1 0 1 0 0 0
-  3  0 1 0 0 0 1 0 0
-  2  1 0 0 0 0 0 1 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x41221400142200
- Bitboard: 0b1000001001000100001010000000000000101000010001000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x80808f7080800
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x82442800284400
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 1 0 0 0 1 0
-  6  0 0 0 1 0 1 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 0 1 0 1 0 0
-  3  0 0 1 0 0 0 1 0
-  2  0 1 0 0 0 0 0 1
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x82442800284400
- Bitboard: 0b10000010010001000010100000000000001010000100010000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x101010ef101000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- . === BISHOP DEBUG for square 29 ===
-  occ=0xffff00000000ffff
-  mask=0x4085000500800
-  relevant=0x4000000000800
-  magic=0x404002011000
-  shift=57
-  raw_idx=33
-  idx=33
-  result=0x2040814204180800
-  direct=0x40814204180800
-  match: false
-===============================
-
-  bishopMask    : 0x2040814204180800
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 1 0 0 0 0
-  6  0 0 0 1 1 0 0 0
-  5  0 0 1 0 0 0 0 0
-  4  0 1 0 0 0 0 1 0
-  3  1 0 0 0 0 0 0 1
-  2  0 0 0 0 0 0 1 0
-  1  0 0 0 0 0 1 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x2040814204180800
- Bitboard: 0b10000001000000100000010100001000000100000110000000100000000000
-
-  bishopAttackers: 0x2000000000000000
-  rookMask      : 0x202020df202000
-  rookAttackers : 0x0
-  combined attackers: 0x2000000000000000
- X   bishopMask    : 0x4081028408201000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 1 0 0 0
-  6  0 0 0 0 0 1 0 0
-  5  0 0 0 1 0 0 0 0
-  4  0 0 1 0 0 0 0 1
-  3  0 1 0 0 0 0 0 0
-  2  1 0 0 0 0 0 0 1
-  1  0 0 0 0 0 0 1 0
-
-     a b c d e f g h
-
- Bitboard: 0x4081028408201000
- Bitboard: 0b100000010000001000000101000010000001000001000000001000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x404040bf404000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x8102040800402000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 1 0 0
-  6  0 0 0 0 0 0 1 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 0 1 0 0 0 0
-  3  0 0 1 0 0 0 0 0
-  2  0 1 0 0 0 0 0 0
-  1  1 0 0 0 0 0 0 1
-
-     a b c d e f g h
-
- Bitboard: 0x8102040800402000
- Bitboard: 0b1000000100000010000001000000100000000000010000000010000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x8080807f808000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- . 
-  4   bishopMask    : 0x4020002040800
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 1 0 0 0 0
-  6  0 0 1 0 0 0 0 0
-  5  0 1 0 0 0 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  0 1 0 0 0 0 0 0
-  2  0 0 1 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x4020002040800
- Bitboard: 0b100000000100000000000000010000001000000100000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x101fe01010100
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x8050005081000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 1 0 0 0
-  6  0 0 0 1 0 0 0 0
-  5  1 0 1 0 0 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  1 0 1 0 0 0 0 0
-  2  0 0 0 1 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x8050005081000
- Bitboard: 0b1000000001010000000000000101000010000001000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x202fd02020200
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x110a000a112000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 1 0 0
-  6  1 0 0 0 1 0 0 0
-  5  0 1 0 1 0 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  0 1 0 1 0 0 0 0
-  2  1 0 0 0 1 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x110a000a112000
- Bitboard: 0b10001000010100000000000001010000100010010000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x404fb04040400
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x22140014224100
-
-  8  0 0 0 0 0 0 0 0
-  7  1 0 0 0 0 0 1 0
-  6  0 1 0 0 0 1 0 0
-  5  0 0 1 0 1 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  0 0 1 0 1 0 0 0
-  2  0 1 0 0 0 1 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x22140014224100
- Bitboard: 0b100010000101000000000000010100001000100100000100000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x808f708080800
-  rookAttackers : 0x0
-  combined attackers: 0x0
- . === BISHOP DEBUG for square 36 ===
-  occ=0xffff00000000ffff
-  mask=0x44280028440200
-  relevant=0x44000000000200
-  magic=0x404040040100
-  shift=55
-  raw_idx=137
-  idx=137
-  result=0x40a1020c0c0200
-  direct=0x40a1020c0c0200
-  match: true
-===============================
-
-  bishopMask    : 0x40a1020c0c0200
-
-  8  0 0 0 0 0 0 0 0
-  7  0 1 0 0 0 0 0 0
-  6  0 0 1 1 0 0 0 0
-  5  0 0 1 1 0 0 0 0
-  4  0 1 0 0 0 0 0 0
-  3  1 0 0 0 0 1 0 1
-  2  0 0 0 0 0 0 1 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x40a1020c0c0200
- Bitboard: 0b1000000101000010000001000001100000011000000001000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x1010ef10101000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x4081420418080400
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 1 0 0 0 0 0
-  6  0 0 0 1 0 0 0 0
-  5  0 0 0 1 1 0 0 0
-  4  0 0 1 0 0 0 0 0
-  3  0 1 0 0 0 0 1 0
-  2  1 0 0 0 0 0 0 1
-  1  0 0 0 0 0 0 1 0
-
-     a b c d e f g h
-
- Bitboard: 0x4081420418080400
- Bitboard: 0b100000010000001010000100000010000011000000010000000010000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x2020df20202000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x8102840820100800
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 1 0 0 0 0
-  6  0 0 0 0 1 0 0 0
-  5  0 0 0 0 0 1 0 0
-  4  0 0 0 1 0 0 0 0
-  3  0 0 1 0 0 0 0 1
-  2  0 1 0 0 0 0 0 0
-  1  1 0 0 0 0 0 0 1
-
-     a b c d e f g h
-
- Bitboard: 0x8102840820100800
- Bitboard: 0b1000000100000010100001000000100000100000000100000000100000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x4040bf40404000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x20400040201000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 1 0 0 0
-  6  0 0 0 0 0 1 0 0
-  5  0 0 0 0 0 0 1 0
-  4  0 0 0 0 0 0 0 0
-  3  0 0 0 0 0 0 1 0
-  2  0 0 0 0 0 1 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x20400040201000
- Bitboard: 0b100000010000000000000001000000001000000001000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x80807f80808000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- . 
-  3   bishopMask    : 0x2000204081000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 1 0 0 0
-  6  0 0 0 1 0 0 0 0
-  5  0 0 1 0 0 0 0 0
-  4  0 1 0 0 0 0 0 0
-  3  0 0 0 0 0 0 0 0
-  2  0 1 0 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x2000204081000
- Bitboard: 0b10000000000000001000000100000010000001000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x1fe0101010100
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x5000508102000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 1 0 0
-  6  0 0 0 0 1 0 0 0
-  5  0 0 0 1 0 0 0 0
-  4  1 0 1 0 0 0 0 0
-  3  0 0 0 0 0 0 0 0
-  2  1 0 1 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x5000508102000
- Bitboard: 0b101000000000000010100001000000100000010000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x2fd0202020200
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0xa000a11204000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 0 1 0
-  6  0 0 0 0 0 1 0 0
-  5  1 0 0 0 1 0 0 0
-  4  0 1 0 1 0 0 0 0
-  3  0 0 0 0 0 0 0 0
-  2  0 1 0 1 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0xa000a11204000
- Bitboard: 0b1010000000000000101000010001001000000100000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x4fb0404040400
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x2050810606090000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 0 0 0
-  6  1 0 0 1 0 0 0 0
-  5  0 1 1 0 0 0 0 0
-  4  0 1 1 0 0 0 0 0
-  3  1 0 0 0 0 0 0 1
-  2  0 0 0 0 1 0 1 0
-  1  0 0 0 0 0 1 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x2050810606090000
- Bitboard: 0b10000001010000100000010000011000000110000010010000000000000000
-
-  bishopAttackers: 0x2000000000000000
-  rookMask      : 0x8f70808080800
-  rookAttackers : 0x0
-  combined attackers: 0x2000000000000000
- X   bishopMask    : 0x40a1020c0c020100
-
-  8  0 0 0 0 0 0 0 0
-  7  1 0 0 0 0 0 0 0
-  6  0 1 0 0 0 0 0 0
-  5  0 0 1 1 0 0 0 0
-  4  0 0 1 1 0 0 0 0
-  3  0 1 0 0 0 0 0 0
-  2  1 0 0 0 0 1 0 1
-  1  0 0 0 0 0 0 1 0
-
-     a b c d e f g h
-
- Bitboard: 0x40a1020c0c020100
- Bitboard: 0b100000010100001000000100000110000001100000000100000000100000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x10ef1010101000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x8142041808040200
-
-  8  0 0 0 0 0 0 0 0
-  7  0 1 0 0 0 0 0 0
-  6  0 0 1 0 0 0 0 0
-  5  0 0 0 1 0 0 0 0
-  4  0 0 0 1 1 0 0 0
-  3  0 0 1 0 0 0 0 0
-  2  0 1 0 0 0 0 1 0
-  1  1 0 0 0 0 0 0 1
-
-     a b c d e f g h
-
- Bitboard: 0x8142041808040200
- Bitboard: 0b1000000101000010000001000001100000001000000001000000001000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x20df2020202000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0xa000a010080400
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 1 0 0 0 0 0
-  6  0 0 0 1 0 0 0 0
-  5  0 0 0 0 1 0 0 0
-  4  0 0 0 0 0 1 0 1
-  3  0 0 0 0 0 0 0 0
-  2  0 0 0 0 0 1 0 1
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0xa000a010080400
- Bitboard: 0b10100000000000001010000000010000000010000000010000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x40bf4040404000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x40004020100800
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 1 0 0 0 0
-  6  0 0 0 0 1 0 0 0
-  5  0 0 0 0 0 1 0 0
-  4  0 0 0 0 0 0 1 0
-  3  0 0 0 0 0 0 0 0
-  2  0 0 0 0 0 0 1 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x40004020100800
- Bitboard: 0b1000000000000000100000000100000000100000000100000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x807f8080808000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- . 
-  2   bishopMask    : 0x200020408102000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 1 0 0
-  6  0 0 0 0 1 0 0 0
-  5  0 0 0 1 0 0 0 0
-  4  0 0 1 0 0 0 0 0
-  3  0 1 0 0 0 0 0 0
-  2  0 0 0 0 0 0 0 0
-  1  0 1 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x200020408102000
- Bitboard: 0b1000000000000000100000010000001000000100000010000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x102010101010100
-  rookAttackers : 0x100000000000000
-  combined attackers: 0x100000000000000
- X   bishopMask    : 0x500050810204000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 0 1 0
-  6  0 0 0 0 0 1 0 0
-  5  0 0 0 0 1 0 0 0
-  4  0 0 0 1 0 0 0 0
-  3  1 0 1 0 0 0 0 0
-  2  0 0 0 0 0 0 0 0
-  1  1 0 1 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x500050810204000
- Bitboard: 0b10100000000000001010000100000010000001000000100000000000000
-
-  bishopAttackers: 0x400000000000000
-  rookMask      : 0x205020202020200
-  rookAttackers : 0x0
-  combined attackers: 0x400000000000000
- X   bishopMask    : 0x2840830304080000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 0 0 0
-  6  0 0 0 1 0 0 0 0
-  5  0 0 1 0 0 0 0 0
-  4  1 1 0 0 0 0 0 0
-  3  1 1 0 0 0 0 0 1
-  2  0 0 0 0 0 0 1 0
-  1  0 0 0 1 0 1 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x2840830304080000
- Bitboard: 0b10100001000000100000110000001100000100000010000000000000000000
-
-  bishopAttackers: 0x2800000000000000
-  rookMask      : 0x40a040404040400
-  rookAttackers : 0x0
-  combined attackers: 0x2800000000000000
- X   bishopMask    : 0x5081060609000000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 0 0 0
-  6  0 0 0 0 0 0 0 0
-  5  1 0 0 1 0 0 0 0
-  4  0 1 1 0 0 0 0 0
-  3  0 1 1 0 0 0 0 0
-  2  1 0 0 0 0 0 0 1
-  1  0 0 0 0 1 0 1 0
-
-     a b c d e f g h
-
- Bitboard: 0x5081060609000000
- Bitboard: 0b101000010000001000001100000011000001001000000000000000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x814080808080800
-  rookAttackers : 0x800000000000000
-  combined attackers: 0x800000000000000
- X   bishopMask    : 0xa1020c0c02010000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 0 0 0
-  6  1 0 0 0 0 0 0 0
-  5  0 1 0 0 0 0 0 0
-  4  0 0 1 1 0 0 0 0
-  3  0 0 1 1 0 0 0 0
-  2  0 1 0 0 0 0 0 0
-  1  1 0 0 0 0 1 0 1
-
-     a b c d e f g h
-
- Bitboard: 0xa1020c0c02010000
- Bitboard: 0b1010000100000010000011000000110000000010000000010000000000000000
-
-  bishopAttackers: 0x2000000000000000
-  rookMask      : 0x1028101010101000
-  rookAttackers : 0x0
-  combined attackers: 0x2000000000000000
- X   bishopMask    : 0x5000508804020100
-
-  8  0 0 0 0 0 0 0 0
-  7  1 0 0 0 0 0 0 0
-  6  0 1 0 0 0 0 0 0
-  5  0 0 1 0 0 0 0 0
-  4  0 0 0 1 0 0 0 1
-  3  0 0 0 0 1 0 1 0
-  2  0 0 0 0 0 0 0 0
-  1  0 0 0 0 1 0 1 0
-
-     a b c d e f g h
-
- Bitboard: 0x5000508804020100
- Bitboard: 0b101000000000000010100001000100000000100000000100000000100000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x2050202020202000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0xa000a01008040200
-
-  8  0 0 0 0 0 0 0 0
-  7  0 1 0 0 0 0 0 0
-  6  0 0 1 0 0 0 0 0
-  5  0 0 0 1 0 0 0 0
-  4  0 0 0 0 1 0 0 0
-  3  0 0 0 0 0 1 0 1
-  2  0 0 0 0 0 0 0 0
-  1  0 0 0 0 0 1 0 1
-
-     a b c d e f g h
-
- Bitboard: 0xa000a01008040200
- Bitboard: 0b1010000000000000101000000001000000001000000001000000001000000000
-
-  bishopAttackers: 0x2000000000000000
-  rookMask      : 0x40a0404040404000
-  rookAttackers : 0x0
-  combined attackers: 0x2000000000000000
- X   bishopMask    : 0x4000402010080400
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 1 0 0 0 0 0
-  6  0 0 0 1 0 0 0 0
-  5  0 0 0 0 1 0 0 0
-  4  0 0 0 0 0 1 0 0
-  3  0 0 0 0 0 0 1 0
-  2  0 0 0 0 0 0 0 0
-  1  0 0 0 0 0 0 1 0
-
-     a b c d e f g h
-
- Bitboard: 0x4000402010080400
- Bitboard: 0b100000000000000010000000010000000010000000010000000010000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x8040808080808000
-  rookAttackers : 0x8000000000000000
-  combined attackers: 0x8000000000000000
- X 
-  1   bishopMask    : 0x2000000000000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 0 0 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  0 0 0 0 0 0 0 0
-  2  0 1 0 0 0 0 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x2000000000000
- Bitboard: 0b10000000000000000000000000000000000000000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x201000000000000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x2041810204080000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 0 0 0
-  6  0 0 0 1 0 0 0 0
-  5  0 0 1 0 0 0 0 0
-  4  0 1 0 0 0 0 0 0
-  3  1 0 0 0 0 0 0 1
-  2  1 0 0 0 0 0 1 0
-  1  0 0 0 0 0 1 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x2041810204080000
- Bitboard: 0b10000001000001100000010000001000000100000010000000000000000000
-
-  bishopAttackers: 0x2000000000000000
-  rookMask      : 0x502000000000000
-  rookAttackers : 0x100000000000000
-  combined attackers: 0x2100000000000000
- X   bishopMask    : 0x4083020408000000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 0 0 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 1 0 0 0 0
-  4  0 0 1 0 0 0 0 0
-  3  0 1 0 0 0 0 0 0
-  2  1 1 0 0 0 0 0 1
-  1  0 0 0 0 0 0 1 0
-
-     a b c d e f g h
-
- Bitboard: 0x4083020408000000
- Bitboard: 0b100000010000011000000100000010000001000000000000000000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0xa04000000000000
-  rookAttackers : 0x800000000000000
-  combined attackers: 0x800000000000000
- X   bishopMask    : 0x8106040800000000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 0 0 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 0 1 0 0 0 0
-  3  0 0 1 0 0 0 0 0
-  2  0 1 1 0 0 0 0 0
-  1  1 0 0 0 0 0 0 1
-
-     a b c d e f g h
-
- Bitboard: 0x8106040800000000
- Bitboard: 0b1000000100000110000001000000100000000000000000000000000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x1408000000000000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0x28000000000000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 0 0 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  0 0 0 0 0 0 0 0
-  2  0 0 0 1 0 1 0 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x28000000000000
- Bitboard: 0b101000000000000000000000000000000000000000000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x2810000000000000
-  rookAttackers : 0x800000000000000
-  combined attackers: 0x800000000000000
- X   bishopMask    : 0x50000000000000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 0 0 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  0 0 0 0 0 0 0 0
-  2  0 0 0 0 1 0 1 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x50000000000000
- Bitboard: 0b1010000000000000000000000000000000000000000000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x5020000000000000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- .   bishopMask    : 0xa0000000000000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 0 0 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  0 0 0 0 0 0 0 0
-  2  0 0 0 0 0 1 0 1
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0xa0000000000000
- Bitboard: 0b10100000000000000000000000000000000000000000000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0xa040000000000000
-  rookAttackers : 0x8000000000000000
-  combined attackers: 0x8000000000000000
- X   bishopMask    : 0x40000000000000
-
-  8  0 0 0 0 0 0 0 0
-  7  0 0 0 0 0 0 0 0
-  6  0 0 0 0 0 0 0 0
-  5  0 0 0 0 0 0 0 0
-  4  0 0 0 0 0 0 0 0
-  3  0 0 0 0 0 0 0 0
-  2  0 0 0 0 0 0 1 0
-  1  0 0 0 0 0 0 0 0
-
-     a b c d e f g h
-
- Bitboard: 0x40000000000000
- Bitboard: 0b1000000000000000000000000000000000000000000000000000000
-
-  bishopAttackers: 0x0
-  rookMask      : 0x4080000000000000
-  rookAttackers : 0x0
-  combined attackers: 0x0
- . 
-
-   a  b  c  d  e  f  g  h
-
-=== end attacked squares ===

From 3c5a01f4f69073eea7376721aa7bc46ed9ab9db5 Mon Sep 17 00:00:00 2001
From: Jakob <jakob.dekleva@gmail.com>
Date: Mon, 16 Jun 2025 15:12:44 +0200
Subject: [PATCH 7/8] Fix: rm board

---
 src/test.zig  | 1 -
 src/types.zig | 1 -
 2 files changed, 2 deletions(-)

diff --git a/src/test.zig b/src/test.zig
index ff1db05..7d4aa33 100644
--- a/src/test.zig
+++ b/src/test.zig
@@ -16,7 +16,6 @@ test "test print bitboard" {
 test "test print bitboard unicode" {
     var b: types.Board = .{
         .pieces = [_]types.Bitboard{0} ** types.Board.PieceCount,
-        .board = undefined,
         .side = types.Color.Black,
         .enpassant = types.square.e3,
         .castle = @intFromEnum(types.Castle.WK) | @intFromEnum(types.Castle.WQ) | @intFromEnum(types.Castle.BK) | @intFromEnum(types.Castle.BQ),
diff --git a/src/types.zig b/src/types.zig
index 38a11b2..9bb3866 100644
--- a/src/types.zig
+++ b/src/types.zig
@@ -138,7 +138,6 @@ pub const Board = struct {
     pub const PieceCount = @intFromEnum(Piece.NO_PIECE) + 1;
 
     pieces: [PieceCount]Bitboard,
-    board: [64]Piece,
     side: Color,
     enpassant: square,
     castle: u8, // bitmask of Castle.*

From a2f8d3cd28d9c7d65714002ee93dad229599003f Mon Sep 17 00:00:00 2001
From: Jakob <jakob.dekleva@gmail.com>
Date: Mon, 16 Jun 2025 21:32:05 +0200
Subject: [PATCH 8/8] Chore: add tests

---
 README.md             |  2 +-
 scripts/GetAttacks.py | 64 +++++++++++++++++++++++++++++++++++++++++++
 src/test.zig          | 52 +++++++++++++++++++++++++++++++++++
 3 files changed, 117 insertions(+), 1 deletion(-)
 create mode 100644 scripts/GetAttacks.py

diff --git a/README.md b/README.md
index e2ee939..340c3ea 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ This chess engine is still in development. When I have it in working order and w
 
 ## Strength
 
-**TODO :**
+**TODO:**
 
 - Update the strength table:
 
diff --git a/scripts/GetAttacks.py b/scripts/GetAttacks.py
new file mode 100644
index 0000000..86f4112
--- /dev/null
+++ b/scripts/GetAttacks.py
@@ -0,0 +1,64 @@
+import chess
+
+# A diverse set of FEN positions for testing
+fen_positions = [
+    "8/8/8/8/8/8/8/8 w - - ",
+    "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1",
+    "r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq - 0 1",
+    "rnbqkb1r/pp1p1pPp/8/2p1pP2/1P1P4/3P3P/P1P1P3/RNBQKBNR w KQkq e6 0 1",
+    "r2q1rk1/ppp2ppp/2n1bn2/2b1p3/3pP3/3P1NPP/PPP1NPB1/R1BQ1RK1 b - - 0 9 ",
+    "r3k2r/8/8/8/3pPp2/8/8/R3K1RR b KQkq e3 0 1",
+    "r3k2r/Pppp1ppp/1b3nbN/nP6/BBP1P3/q4N2/Pp1P2PP/R2Q1RK1 w kq - 0 1",
+    "8/7p/p5pb/4k3/P1pPn3/8/P5PP/1rB2RK1 b - d3 0 28",
+    "8/3K4/2p5/p2b2r1/5k2/8/8/1q6 b - - 1 67",
+    "rnbqkb1r/ppppp1pp/7n/4Pp2/8/8/PPPP1PPP/RNBQKBNR w KQkq f6 0 3",
+    "n1n5/PPPk4/8/8/8/8/4Kppp/5N1N b - - 0 1",
+    "r3k2r/p6p/8/B7/1pp1p3/3b4/P6P/R3K2R w KQkq - 0 1",
+    "8/2p5/3p4/KP5r/1R3p1k/8/4P1P1/8 w - - 0 1",
+    "r6r/1b2k1bq/8/8/7B/8/8/R3K2R b KQ - 3 2",
+    "8/8/8/2k5/2pP4/8/B7/4K3 b - d3 0 3",
+    "r1bqkbnr/pppppppp/n7/8/8/P7/1PPPPPPP/RNBQKBNR w KQkq - 2 2",
+    "r3k2r/p1pp1pb1/bn2Qnp1/2qPN3/1p2P3/2N5/PPPBBPPP/R3K2R b KQkq - 3 2",
+    "2kr3r/p1ppqpb1/bn2Qnp1/3PN3/1p2P3/2N5/PPPBBPPP/R3K2R b KQ - 3 2",
+    "rnb2k1r/pp1Pbppp/2p5/q7/2B5/8/PPPQNnPP/RNB1K2R w KQ - 3 9",
+]
+
+
+def to_zig_hex(bb: int) -> str:
+    """Converts a python-chess bitboard (big-endian) to a little-endian hex string for Zig."""
+    raw_be = bb.to_bytes(8, byteorder="big")
+    raw_le = raw_be[::-1]
+    zig_int = int.from_bytes(raw_le, byteorder="big")
+    return f"0x{zig_int:016x}"
+
+
+white_attacks_bb_arr = []
+black_attacks_bb_arr = []
+
+for fen in fen_positions:
+    board = chess.Board(fen)
+    print(f"FEN: {fen}")
+    print(board)
+
+    white_attacks_bb = 0
+    black_attacks_bb = 0
+
+    # Iterate over all 64 squares to build the attack maps
+    for sq in chess.SQUARES:
+        # Check if the square is attacked by white
+        if board.is_attacked_by(chess.WHITE, sq):
+            white_attacks_bb |= 1 << sq
+
+        # Check if the square is attacked by black
+        if board.is_attacked_by(chess.BLACK, sq):
+            black_attacks_bb |= 1 << sq
+
+    white_attacks_bb_arr.append(white_attacks_bb)
+    black_attacks_bb_arr.append(black_attacks_bb)
+
+    print(f"White Attacks: {to_zig_hex(white_attacks_bb)}")
+    print(f"Black Attacks: {to_zig_hex(black_attacks_bb)}")
+    print("-" * 40)
+
+print(f"White Attacks list: {white_attacks_bb_arr} \n")
+print(f"Black Attacks list: {black_attacks_bb_arr} \n")
diff --git a/src/test.zig b/src/test.zig
index 7d4aa33..45ed7bc 100644
--- a/src/test.zig
+++ b/src/test.zig
@@ -375,3 +375,55 @@ test "test fen parsing" {
         );
     }
 }
+
+test "is square attacked" {
+    attacks.init_attacks();
+
+    const AttackTestVector = struct {
+        fen: []const u8,
+        white_attacks: u64,
+        black_attacks: u64,
+    };
+
+    const test_vectors = [_]AttackTestVector{
+        .{ .fen = "8/8/8/8/8/8/8/8 w - - ", .white_attacks = 0x0000000000000000, .black_attacks = 0x0000000000000000 },
+        .{ .fen = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1", .white_attacks = 9151313343305220096, .black_attacks = 16777086 },
+    };
+
+    for (test_vectors) |vector| {
+        var board = types.Board.new();
+        try bitboard.fan_pars(vector.fen, &board);
+
+        var generated_white_attacks: u64 = 0;
+        var generated_black_attacks: u64 = 0;
+
+        for (0..64) |sq_idx| {
+            const sq: u6 = @intCast(sq_idx);
+            if (bitboard.is_square_attacked(&board, sq, .White)) {
+                generated_white_attacks |= (@as(u64, 1) << sq);
+            }
+            if (bitboard.is_square_attacked(&board, sq, .Black)) {
+                generated_black_attacks |= (@as(u64, 1) << sq);
+            }
+        }
+
+        // Use if-statements to provide more context on failure
+        if (vector.white_attacks != generated_white_attacks) {
+            std.debug.print("\n\nWhite attack mismatch for FEN: {s}\n", .{vector.fen});
+            std.debug.print("Expected: 0x{x}\n", .{vector.white_attacks});
+            bitboard.print_board(vector.white_attacks);
+            std.debug.print("Got: 0x{x}\n", .{generated_white_attacks});
+            bitboard.print_board(generated_white_attacks);
+        }
+        try std.testing.expectEqual(vector.white_attacks, generated_white_attacks);
+
+        if (vector.black_attacks != generated_black_attacks) {
+            std.debug.print("\n\nBlack attack mismatch for FEN: {s}\n", .{vector.fen});
+            std.debug.print("Expected: 0x{x}\n", .{vector.black_attacks});
+            bitboard.print_board(vector.black_attacks);
+            std.debug.print("Got: 0x{x}\n", .{generated_black_attacks});
+            bitboard.print_board(generated_black_attacks);
+        }
+        try std.testing.expectEqual(vector.black_attacks, generated_black_attacks);
+    }
+}