fixed perft
This commit is contained in:
Moritz
parent
e3edb21111
commit
af2178abad
4 changed files with 105 additions and 96 deletions
22
helper_scripts/test
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22
helper_scripts/test
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@ -0,0 +1,22 @@
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a2a3 380
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b2b3 420
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c2c3 420
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d2d3 539
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e2e3 599
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f2f3 380
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g2g3 420
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h2h3 380
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a2a4 420
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b2b4 421
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c2c4 441
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d2d4 560
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e2e4 600
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f2f4 401
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g2g4 421
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h2h4 420
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b1a3 400
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b1c3 440
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g1f3 440
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g1h3 400
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Total8902
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84
src/main.rs
84
src/main.rs
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@ -4,88 +4,6 @@ use chess_engine::movegen::legal_check::is_king_attacked;
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use chess_engine::r#move::*;
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fn count_legal_moves_recursive(board: &mut Board, depth: u8) -> u64 {
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if depth == 0 {
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return 1_u64;
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}
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let mut list = MoveList::new();
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generate_pseudo_legal_moves(&board, &mut list);
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let mut leaf_nodes = 0_u64;
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for mv in list.iter() {
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let undo_info = board.make_move(*mv);
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if !is_king_attacked(board) {
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leaf_nodes += count_legal_moves_recursive(board, depth - 1);
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}
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board.undo_move(undo_info);
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}
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leaf_nodes
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}
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fn perft() {
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// TalkChess PERFT Tests (by Martin Sedlak)
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//--Illegal ep move #1
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let mut board = Board::from_fen("3k4/3p4/8/K1P4r/8/8/8/8 b - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 1134888);
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//--Illegal ep move #2
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let mut board = Board::from_fen("8/8/4k3/8/2p5/8/B2P2K1/8 w - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 1015133);
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//--EP Capture Checks Opponent
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let mut board = Board::from_fen("8/8/1k6/2b5/2pP4/8/5K2/8 b - d3 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 1440467);
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//--Short Castling Gives Check
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let mut board = Board::from_fen("5k2/8/8/8/8/8/8/4K2R w K - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 661072);
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//--Long Castling Gives Check
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let mut board = Board::from_fen("3k4/8/8/8/8/8/8/R3K3 w Q - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 803711);
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//--Castle Rights
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let mut board = Board::from_fen("r3k2r/1b4bq/8/8/8/8/7B/R3K2R w KQkq - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 4), 1274206);
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//--Castling Prevented
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let mut board = Board::from_fen("r3k2r/8/3Q4/8/8/5q2/8/R3K2R b KQkq - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 4), 1720476);
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//--Promote out of Check
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let mut board = Board::from_fen("2K2r2/4P3/8/8/8/8/8/3k4 w - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 3821001);
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//--Discovered Check
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let mut board = Board::from_fen("8/8/1P2K3/8/2n5/1q6/8/5k2 b - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 5), 1004658);
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//--Promote to give check
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let mut board = Board::from_fen("4k3/1P6/8/8/8/8/K7/8 w - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 217342);
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//--Under Promote to give check
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let mut board = Board::from_fen("8/P1k5/K7/8/8/8/8/8 w - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 92683);
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//--Self Stalemate
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let mut board = Board::from_fen("K1k5/8/P7/8/8/8/8/8 w - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 2217);
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//--Stalemate & Checkmate
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let mut board = Board::from_fen("8/k1P5/8/1K6/8/8/8/8 w - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 7), 567584);
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//--Stalemate & Checkmate
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let mut board = Board::from_fen("8/8/2k5/5q2/5n2/8/5K2/8 b - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 4), 23527);
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// Standard position
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let mut board = Board::from_fen("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 3), 8902);
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}
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fn main() {
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perft();
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}
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@ -58,7 +58,7 @@ pub fn generate_pawn_moves(board: &Board, list: &mut MoveList) {
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// 1.3 Captures
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// 1.3.1 A-Side Capture (omitted promotion captures)
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let mut a_side_capture_targets = (friendly_pawns & PAWN_H_SIDE_CAPTURE_MASK_WITHE) << 7 & opponent_occupied;
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let mut a_side_capture_targets = (friendly_pawns & PAWN_A_SIDE_CAPTURE_MASK_WITHE) << 7 & opponent_occupied;
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while a_side_capture_targets > 0 {
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let to = SQUARES[a_side_capture_targets.trailing_zeros() as usize];
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@ -68,7 +68,7 @@ pub fn generate_pawn_moves(board: &Board, list: &mut MoveList) {
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}
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// 1.3.2 H-Side Capture (omitted promotion captures)
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let mut h_side_capture_targets = (friendly_pawns & PAWN_A_SIDE_CAPTURE_MASK_WITHE) << 9 & opponent_occupied;
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let mut h_side_capture_targets = (friendly_pawns & PAWN_H_SIDE_CAPTURE_MASK_WITHE) << 9 & opponent_occupied;
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while h_side_capture_targets > 0 {
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let to = SQUARES[h_side_capture_targets.trailing_zeros() as usize];
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@ -124,14 +124,14 @@ pub fn generate_pawn_moves(board: &Board, list: &mut MoveList) {
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let en_passant_target_bb: u64 = 1_u64 << (en_passant_target_square as u64);
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// 1. Check A-Side capture (<< 7, e.g., D5 -> C6)
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let attacker_mask_a_side = (en_passant_target_bb >> 7) & PAWN_H_SIDE_CAPTURE_MASK_WITHE;
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let attacker_mask_a_side = (en_passant_target_bb >> 7) & PAWN_A_SIDE_CAPTURE_MASK_WITHE;
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if (attacker_mask_a_side & friendly_pawns) > 0 {
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let from = en_passant_target_square - 7;
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list.push(Move::new(from, en_passant_target_square, MOVE_FLAG_EN_PASSANT));
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}
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// 2. Check H-Side capture (<< 9, e.g., B5 -> C6)
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let attacker_mask_h_side = (en_passant_target_bb >> 9) & PAWN_A_SIDE_CAPTURE_MASK_WITHE;
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let attacker_mask_h_side = (en_passant_target_bb >> 9) & PAWN_H_SIDE_CAPTURE_MASK_WITHE;
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if (attacker_mask_h_side & friendly_pawns) > 0 {
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let from = en_passant_target_square - 9;
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list.push(Move::new(from, en_passant_target_square, MOVE_FLAG_EN_PASSANT));
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@ -28,15 +28,84 @@ fn count_legal_moves_recursive(board: &mut Board, depth: u8) -> u64 {
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#[test]
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fn perft() {
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// TalkChess PERFT Tests (by Martin Sedlak)
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// Illegal ep move #1
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let mut board = Board::from_fen("3k4/3p4/8/K1P4r/8/8/8/8 b - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 1134888, "Illegal ep move #1");
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// Illegal ep move #2
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let mut board = Board::from_fen("8/8/4k3/8/2p5/8/B2P2K1/8 w - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 1015133, "Illegal ep move #2");
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// EP Capture Checks Opponent
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let mut board = Board::from_fen("8/8/1k6/2b5/2pP4/8/5K2/8 b - d3 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 1440467, "EP Capture Checks Opponent");
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// Short Castling Gives Check
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let mut board = Board::from_fen("5k2/8/8/8/8/8/8/4K2R w K - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 661072, "Short Castling Gives Check");
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// Long Castling Gives Check
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let mut board = Board::from_fen("3k4/8/8/8/8/8/8/R3K3 w Q - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 803711, "Long Castling Gives Check");
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// Castle Rights
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let mut board = Board::from_fen("r3k2r/1b4bq/8/8/8/8/7B/R3K2R w KQkq - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 4), 1274206, "Castle Rights");
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// Castling Prevented
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let mut board = Board::from_fen("r3k2r/8/3Q4/8/8/5q2/8/R3K2R b KQkq - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 4), 1720476, "Castling Prevented");
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// Promote out of Check
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let mut board = Board::from_fen("2K2r2/4P3/8/8/8/8/8/3k4 w - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 3821001, "Promote out of Check");
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// Discovered Check
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let mut board = Board::from_fen("8/8/1P2K3/8/2n5/1q6/8/5k2 b - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 5), 1004658, "Discovered Check");
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// Promote to give check
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let mut board = Board::from_fen("4k3/1P6/8/8/8/8/K7/8 w - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 217342, "Promote to give check");
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// Under Promote to give check
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let mut board = Board::from_fen("8/P1k5/K7/8/8/8/8/8 w - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 92683, "Under Promote to give check");
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// Self Stalemate
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let mut board = Board::from_fen("K1k5/8/P7/8/8/8/8/8 w - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 2217, "Self Stalemate");
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// Stalemate & Checkmate
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let mut board = Board::from_fen("8/k1P5/8/1K6/8/8/8/8 w - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 7), 567584, "Stalemate & Checkmate");
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// Stalemate & Checkmate
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let mut board = Board::from_fen("8/8/2k5/5q2/5n2/8/5K2/8 b - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 4), 23527, "Stalemate & Checkmate");
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// Standard position
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let mut board = Board::from_fen("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 6), 119060324, "Standard position");
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// Kiwipete
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let mut board = Board::from_fen("r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq - 0 1");
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println!("{}", count_legal_moves_recursive(&mut board, 1));
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}
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assert_eq!(count_legal_moves_recursive(&mut board, 5), 193690690, "Kiwipete");
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// Position 3
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let mut board = Board::from_fen("8/2p5/3p4/KP5r/1R3p1k/8/4P1P1/8 w - - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 5), 674624, "Position 3");
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// "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1" 7 3195901860 "false"
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// "r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq -" 5 193690690 "false"
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// "8/2p5/3p4/KP5r/1R3p1k/8/4P1P1/8 w - -" 7 178633661 "false"
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// "r3k2r/Pppp1ppp/1b3nbN/nP6/BBP1P3/q4N2/Pp1P2PP/R2Q1RK1 w kq - 0 1" 6 706045033 "false"
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// "rnbq1k1r/pp1Pbppp/2p5/8/2B5/8/PPP1NnPP/RNBQK2R w KQ - 1 8" 5 89941194 "false"
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// "r4rk1/1pp1qppp/p1np1n2/2b1p1B1/2B1P1b1/P1NP1N2/1PP1QPPP/R4RK1 w - - 0 10" 5 164075551 "false"
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// "r7/4p3/5p1q/3P4/4pQ2/4pP2/6pp/R3K1kr w Q - 1 3" 5 11609488 "false"
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// Position 4
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let mut board = Board::from_fen("r2q1rk1/pP1p2pp/Q4n2/bbp1p3/Np6/1B3NBn/pPPP1PPP/R3K2R b KQ - 0 1");
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assert_eq!(count_legal_moves_recursive(&mut board, 5), 15833292, "Position 4");
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// Position 5
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let mut board = Board::from_fen("rnbq1k1r/pp1Pbppp/2p5/8/2B5/8/PPP1NnPP/RNBQK2R w KQ - 1 8");
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assert_eq!(count_legal_moves_recursive(&mut board, 4), 2103487, "Position 5");
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// Position 6
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let mut board = Board::from_fen("r4rk1/1pp1qppp/p1np1n2/2b1p1B1/2B1P1b1/P1NP1N2/1PP1QPPP/R4RK1 w - - 0 10");
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assert_eq!(count_legal_moves_recursive(&mut board, 5), 164075551, "Position 6");
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}
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