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added (failing) perft, debugging required

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Moritz 2025-11-14 13:56:49 +01:00
parent 2aca5ed841
commit 196e5ba265
4 changed files with 45 additions and 78 deletions
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55
tests/castling_under_attack.rs
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@ -1,55 +0,0 @@
use chess_engine::board::Board;
use chess_engine::movegen::generate_pseudo_legal_moves;
use chess_engine::r#move::{Move, MoveList, MOVE_FLAG_WK_CASTLE, MOVE_FLAG_WQ_CASTLE, MOVE_FLAG_BK_CASTLE, MOVE_FLAG_BQ_CASTLE};
use chess_engine::square::Square;
fn assert_move_generated(fen:&str, mv: Move, contains: bool) {
let mut list = MoveList::new();
let mut board = Board::from_fen(fen);
generate_pseudo_legal_moves(&mut board, &mut list);
assert_eq!(list.contains(&mv), contains, "board '{fen}' contains move '{mv}': {contains}")
}
#[test]
fn test_wk_castle_under_attacks() {
let kingside_castle = Move::new(Square::E1, Square::G1, MOVE_FLAG_WK_CASTLE);
assert_move_generated("4k3/8/3r4/8/8/8/8/4K2R w K - 0 1", kingside_castle, true);
assert_move_generated("4k3/8/4r3/8/8/8/8/4K2R w K - 0 1", kingside_castle, false);
assert_move_generated("4k3/8/5r2/8/8/8/8/4K2R w K - 0 1", kingside_castle, false);
assert_move_generated("4k3/8/6r1/8/8/8/8/4K2R w K - 0 1", kingside_castle, false);
assert_move_generated("4k3/8/7r/8/8/8/8/4K2R w K - 0 1", kingside_castle, true);
assert_move_generated("4k3/8/8/8/8/8/8/r3K2R w K - 0 1", kingside_castle, false);
}
#[test]
fn test_wq_castle_under_attacks() {
let kingside_castle = Move::new(Square::E1, Square::C1, MOVE_FLAG_WQ_CASTLE);
assert_move_generated("4k3/8/5r2/8/8/8/8/R3K3 w Q - 0 1", kingside_castle, true);
assert_move_generated("4k3/8/4r3/8/8/8/8/R3K3 w Q - 0 1", kingside_castle, false);
assert_move_generated("4k3/8/3r4/8/8/8/8/R3K3 w Q - 0 1", kingside_castle, false);
assert_move_generated("4k3/8/2r5/8/8/8/8/R3K3 w Q - 0 1", kingside_castle, false);
assert_move_generated("4k3/8/1r6/8/8/8/8/R3K3 w Q - 0 1", kingside_castle, true);
assert_move_generated("4k3/8/r7/8/8/8/8/R3K3 w Q - 0 1", kingside_castle, true);
}
#[test]
fn test_bk_castle_under_attacks() {
let kingside_castle = Move::new(Square::E8, Square::G8, MOVE_FLAG_BK_CASTLE);
assert_move_generated("4k2r/8/8/8/8/3R4/8/4K3 b k - 0 1", kingside_castle, true);
assert_move_generated("4k2r/8/8/8/8/4R3/8/4K3 b k - 0 1", kingside_castle, false);
assert_move_generated("4k2r/8/8/8/8/5R2/8/4K3 b k - 0 1", kingside_castle, false);
assert_move_generated("4k2r/8/8/8/8/6R1/8/4K3 b k - 0 1", kingside_castle, false);
assert_move_generated("4k2r/8/8/8/8/7R/8/4K3 b k - 0 1", kingside_castle, true);
assert_move_generated("2R1k2r/8/8/8/8/8/8/4K3 b k - 0 1", kingside_castle, false);
}
#[test]
fn test_bq_castle_under_attacks() {
let kingside_castle = Move::new(Square::E8, Square::C8, MOVE_FLAG_BQ_CASTLE);
assert_move_generated("r3k3/8/8/8/8/5R2/8/4K3 b q - 0 1", kingside_castle, true);
assert_move_generated("r3k3/8/8/8/8/4R3/8/4K3 b q - 0 1", kingside_castle, false);
assert_move_generated("r3k3/8/8/8/8/3R4/8/4K3 b q - 0 1", kingside_castle, false);
assert_move_generated("r3k3/8/8/8/8/2R5/8/4K3 b q - 0 1", kingside_castle, false);
assert_move_generated("r3k3/8/8/8/8/1R6/8/4K3 b q - 0 1", kingside_castle, true);
assert_move_generated("r3k3/8/8/8/8/R7/8/4K3 b q - 0 1", kingside_castle, true);
}

30
tests/perft.rs
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@ -1,7 +1,37 @@
use chess_engine::board::Board;
use chess_engine::movegen::generate_pseudo_legal_moves;
use chess_engine::movegen::legal_check::is_king_attacked;
use chess_engine::r#move::MoveList;
fn count_legal_moves_recursive(board: &mut Board, depth: u8) -> u64 {
if depth == 0 {
return 1_u64;
}
let mut list = MoveList::new();
generate_pseudo_legal_moves(&board, &mut list);
let mut leaf_nodes = 0_u64;
for mv in list.iter() {
// Store the undo info when making the move
let undo_info = board.make_move(*mv);
if !is_king_attacked(board) {
leaf_nodes += count_legal_moves_recursive(board, depth - 1);
}
// Undo the move to restore the board state for the next iteration
board.undo_move(undo_info);
}
leaf_nodes
}
#[test]
fn perft() {
let mut board = Board::from_fen("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1");
println!("{}", count_legal_moves_recursive(&mut board, 4));
}
// "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1" 7 3195901860 "false"
// "r3k2r/p1ppqpb1/bn2pnp1/3PN3/1p2P3/2N2Q1p/PPPBBPPP/R3K2R w KQkq -" 5 193690690 "false"