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Add make_move related functions into move.rs

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stefiosif
2024-07-16 21:29:58 +03:00
parent b24190fd62
commit a1db302d0d
2 changed files with 242 additions and 235 deletions
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233
src/move.rs
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@@ -1,3 +1,10 @@
use crate::{
bitboard::{have_common_bit, lsb, square_to_bitboard},
board::{Board, Color, Kind, Piece},
square::Square,
state::Castle,
};
#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone, Copy)]
pub enum Promote {
Knight,
@@ -42,5 +49,229 @@ impl Move {
}
}
impl Board {
pub fn make_move(&mut self, mv: Move, color: Color) -> bool {
self.update_board_state(&mv, color);
let pieces = match color {
Color::White => &self.white_pieces,
Color::Black => &self.black_pieces,
};
self.state.update_castling_state_quiet(mv.src, color);
self.state
.update_castling_state_capture(mv.dst, Color::opponent_color(color));
self.state.change_side();
let own_king_square = lsb(pieces[Kind::King.idx()].bitboard);
self.is_move_legit(own_king_square, Color::opponent_color(color))
}
pub fn update_board_state(&mut self, mv: &Move, color: Color) {
let (own_pieces, opponent_pieces) = match color {
Color::White => (&mut self.white_pieces, &mut self.black_pieces),
Color::Black => (&mut self.black_pieces, &mut self.white_pieces),
};
match &mv.move_type {
MoveType::Quiet => {
Self::move_piece(mv.src, mv.dst, own_pieces);
self.state.set_en_passant_target_square(None);
}
MoveType::Capture => {
Self::move_piece(mv.src, mv.dst, own_pieces);
Self::remove_piece(mv.dst, opponent_pieces);
self.state.set_en_passant_target_square(None);
}
MoveType::EnPassant => {
Self::move_piece(mv.src, mv.dst, own_pieces);
Self::remove_pawn_enpassant(mv.dst, opponent_pieces, color);
self.state.set_en_passant_target_square(None);
}
MoveType::DoublePush => {
Self::move_piece(mv.src, mv.dst, own_pieces);
let en_passant = match color {
Color::White => Some(mv.src + 8),
Color::Black => Some(mv.src - 8),
};
self.state.set_en_passant_target_square(en_passant);
}
MoveType::Promotion(promote) => {
Self::remove_piece(mv.src, own_pieces);
Self::promote_piece(mv.dst, own_pieces, *promote);
self.state.set_en_passant_target_square(None);
}
MoveType::PromotionCapture(promote) => {
Self::remove_piece(mv.src, own_pieces);
Self::remove_piece(mv.dst, opponent_pieces);
Self::promote_piece(mv.dst, own_pieces, *promote);
self.state.set_en_passant_target_square(None);
}
MoveType::Castle => {
Self::move_piece(mv.src, mv.dst, own_pieces);
Self::move_rook_castle(mv.dst, own_pieces);
self.state.set_en_passant_target_square(None);
self.state.set_castling_ability(color, Castle::None)
}
}
}
fn move_piece(src: usize, dst: usize, pieces: &mut [Piece; 6]) {
for p in pieces.iter_mut() {
if have_common_bit(p.bitboard, square_to_bitboard(src)) {
p.bitboard &= !square_to_bitboard(src);
p.bitboard |= square_to_bitboard(dst);
break;
}
}
}
fn move_rook_castle(king_dst: usize, pieces: &mut [Piece; 6]) {
let (rook_src, rook_dst) = match king_dst {
Square::C1 | Square::C8 => (king_dst - 2, king_dst + 1),
Square::G1 | Square::G8 => (king_dst + 1, king_dst - 1),
_ => return,
};
Self::move_piece(rook_src, rook_dst, pieces);
}
fn promote_piece(square: usize, pieces: &mut [Piece; 6], promote: Promote) {
match promote {
Promote::Knight => pieces[Kind::Knight.idx()].bitboard |= square_to_bitboard(square),
Promote::Bishop => pieces[Kind::Bishop.idx()].bitboard |= square_to_bitboard(square),
Promote::Rook => pieces[Kind::Rook.idx()].bitboard |= square_to_bitboard(square),
Promote::Queen => pieces[Kind::Queen.idx()].bitboard |= square_to_bitboard(square),
};
}
fn remove_piece(square: usize, pieces: &mut [Piece; 6]) {
for p in pieces.iter_mut() {
if have_common_bit(p.bitboard, square_to_bitboard(square)) {
p.bitboard &= !(square_to_bitboard(square));
break;
}
}
}
fn remove_pawn_enpassant(square: usize, pieces: &mut [Piece; 6], color: Color) {
let piece_to_remove = match color {
Color::White => square - 8,
Color::Black => square + 8,
};
Self::remove_piece(piece_to_remove, pieces);
}
}
#[cfg(test)]
mod tests {}
mod tests {
use crate::{
board::Color,
fen::from_fen,
r#move::{Move, MoveType, Promote},
};
const FEN_QUIET: [&str; 2] = [
"r3k2r/2p1p1qp/2npb3/1p3p2/p3P1pP/P1PB1Q2/1P1PNPP1/R3K2R w KQkq - 0 1",
"r3k2r/2p1p1qp/2npb3/1p3p2/pP2P1pP/P1PB1Q2/3PNPP1/R3K2R b KQkq b3 0 1",
];
#[test]
fn test_make_move_quiet() -> Result<(), String> {
let mut game = from_fen(FEN_QUIET[0])?;
let mv = Move::new_with_type(9, 25, MoveType::DoublePush);
game.board.make_move(mv, Color::White);
assert_eq!(game, from_fen(FEN_QUIET[1])?);
Ok(())
}
const FEN_CAPTURE: [&str; 2] = [
"r3k2r/2p1p1qp/2npb3/1p3p2/p3P1pP/P1PB1Q2/1P1PNPP1/R3K2R w KQkq - 0 1",
"r3k2r/2p1p1qp/2npb3/1p3Q2/p3P1pP/P1PB4/1P1PNPP1/R3K2R b KQkq - 0 1",
];
#[test]
fn test_make_move_capture() -> Result<(), String> {
let mut game = from_fen(FEN_CAPTURE[0])?;
let mv = Move::new_with_type(21, 37, MoveType::Capture);
game.board.make_move(mv, Color::White);
assert_eq!(game, from_fen(FEN_CAPTURE[1])?);
Ok(())
}
const FEN_EN_PASSANT: [&str; 2] = [
"r3k2r/2p1p1qp/2npb3/1p3p2/p3P1pP/P1PB1Q2/1P1PNPP1/R3K2R b KQkq h3 0 1",
"r3k2r/2p1p1qp/2npb3/1p3p2/p3P3/P1PB1Q1p/1P1PNPP1/R3K2R w KQkq - 0 1",
];
#[test]
fn test_make_move_en_passant() -> Result<(), String> {
let mut game = from_fen(FEN_EN_PASSANT[0])?;
let mv = Move::new_with_type(30, 23, MoveType::EnPassant);
game.board.make_move(mv, Color::Black);
assert_eq!(game, from_fen(FEN_EN_PASSANT[1])?);
Ok(())
}
const FEN_DOUBLE_PUSH: [&str; 2] = [
"rnbqkbnr/p1pppppp/8/8/1p5P/8/PPPPPPP1/RNBQKBNR w KQkq - 0 1",
"rnbqkbnr/p1pppppp/8/8/1pP4P/8/PP1PPPP1/RNBQKBNR b KQkq c3 0 1",
];
#[test]
fn test_make_move_double_push() -> Result<(), String> {
let mut game = from_fen(FEN_DOUBLE_PUSH[0])?;
let mv = Move::new_with_type(10, 26, MoveType::DoublePush);
game.board.make_move(mv, Color::White);
assert_eq!(game, from_fen(FEN_DOUBLE_PUSH[1])?);
Ok(())
}
const FEN_PROMOTION: [&str; 2] = [
"8/6P1/4n2b/1p6/1Kp5/6n1/4b3/1k6 w - - 0 1",
"6Q1/8/4n2b/1p6/1Kp5/6n1/4b3/1k6 b - - 0 1",
];
#[test]
fn test_make_move_promotion() -> Result<(), String> {
let mut game = from_fen(FEN_PROMOTION[0])?;
let mv = Move::new_with_type(54, 62, MoveType::Promotion(Promote::Queen));
game.board.make_move(mv, Color::White);
assert_eq!(game, from_fen(FEN_PROMOTION[1])?);
Ok(())
}
const FEN_PROMOTION_CAPTURE: [&str; 2] = [
"5n2/6P1/7b/1p6/1Kp5/6n1/4b3/1k6 w - - 0 1",
"5Q2/8/7b/1p6/1Kp5/6n1/4b3/1k6 b - - 0 1",
];
#[test]
fn test_make_move_promotion_capture() -> Result<(), String> {
let mut game = from_fen(FEN_PROMOTION_CAPTURE[0])?;
let mv = Move::new_with_type(54, 61, MoveType::PromotionCapture(Promote::Queen));
game.board.make_move(mv, Color::White);
assert_eq!(game, from_fen(FEN_PROMOTION_CAPTURE[1])?);
Ok(())
}
const FEN_CASTLE: [&str; 2] = [
"r3k2r/2p1p1qp/2npb3/1p3p2/p3P1pP/P1PB1Q2/1P1PNPP1/R3K2R w KQkq - 0 1",
"r3k2r/2p1p1qp/2npb3/1p3p2/p3P1pP/P1PB1Q2/1P1PNPP1/R4RK1 b kq - 0 1",
];
#[test]
fn test_make_move_castle() -> Result<(), String> {
let mut game = from_fen(FEN_CASTLE[0])?;
let mv = Move::new_with_type(4, 6, MoveType::Castle);
game.board.make_move(mv, Color::White);
assert_eq!(game, from_fen(FEN_CASTLE[1])?);
Ok(())
}
}