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Use 'ChessBoard::occupancy'

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This commit is contained in:
Bruno BELANYI 2024-04-01 01:29:39 +01:00
parent d9e4f16ec8
commit 58d8743106
1 changed files with 6 additions and 7 deletions
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13
src/board/chess_board.rs
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@ -226,7 +226,7 @@ impl ChessBoard {
// Have exactly one king of each color.
for color in Color::iter() {
if (self.piece_occupancy(Piece::King) & self.color_occupancy(color)).count() != 1 {
if self.occupancy(Piece::King, color).count() != 1 {
return false;
}
}
@ -240,14 +240,14 @@ impl ChessBoard {
continue;
}
let actual_rooks = self.piece_occupancy(Piece::Rook) & self.color_occupancy(color);
let actual_rooks = self.occupancy(Piece::Rook, color);
let expected_rooks = castle_rights.unmoved_rooks(color);
// We must check the intersection, in case there are more than 2 rooks on the board.
if (expected_rooks & actual_rooks) != expected_rooks {
return false;
}
let actual_king = self.piece_occupancy(Piece::King) & self.color_occupancy(color);
let actual_king = self.occupancy(Piece::King, color);
let expected_king = Square::new(File::E, color.first_rank());
// We have checked that there is exactly one king, no need for intersecting the sets.
if actual_king != expected_king.into_bitboard() {
@ -260,8 +260,7 @@ impl ChessBoard {
if !(self.combined_occupancy() & square).is_empty() {
return false;
}
let opponent_pawns =
self.piece_occupancy(Piece::Pawn) & self.color_occupancy(!self.current_player());
let opponent_pawns = self.occupancy(Piece::Pawn, !self.current_player());
let double_pushed_pawn = self
.current_player()
.backward_direction()
@ -272,8 +271,8 @@ impl ChessBoard {
}
// Check that kings don't touch each other.
let white_king = self.piece_occupancy(Piece::King) & self.color_occupancy(Color::White);
let black_king = self.piece_occupancy(Piece::King) & self.color_occupancy(Color::Black);
let white_king = self.occupancy(Piece::King, Color::White);
let black_king = self.occupancy(Piece::King, Color::Black);
// Unwrap is fine, we already checked that there is exactly one king of each color
if !(movegen::king_moves(white_king.try_into().unwrap()) & black_king).is_empty() {
return false;