while (pinners)
{
- b = squares_between(ksq, pop_1st_bit(&pinners)) & occupied_squares();
+ b = squares_between(ksq, pop_1st_bit(&pinners)) & pieces();
if (b && single_bit(b) && (b & pieces(sideToMove)))
result |= b;
assert(!square_is_empty(from));
// Update occupancy as if the piece is moving
- occ = occupied_squares() ^ from ^ to;
+ occ = pieces() ^ from ^ to;
// The piece moved in 'to' attacks the square 's' ?
if (attacks_from(piece, to, occ) & s)
Square to = to_sq(m);
Square capsq = to + pawn_push(them);
Square ksq = king_square(us);
- Bitboard b = (occupied_squares() ^ from ^ capsq) | to;
+ Bitboard b = (pieces() ^ from ^ capsq) | to;
assert(to == ep_square());
assert(piece_moved(m) == make_piece(us, PAWN));
}
// In case of king moves under check we have to remove king so to catch
// as invalid moves like b1a1 when opposite queen is on c1.
- else if (attackers_to(to, occupied_squares() ^ from) & pieces(~us))
+ else if (attackers_to(to, pieces() ^ from) & pieces(~us))
return false;
}
// Promotion with check ?
if (is_promotion(m))
- return attacks_from(Piece(promotion_type(m)), to, occupied_squares() ^ from) & ksq;
+ return attacks_from(Piece(promotion_type(m)), to, pieces() ^ from) & ksq;
// En passant capture with check ? We have already handled the case
// of direct checks and ordinary discovered check, the only case we
if (is_enpassant(m))
{
Square capsq = make_square(file_of(to), rank_of(from));
- Bitboard b = (occupied_squares() ^ from ^ capsq) | to;
+ Bitboard b = (pieces() ^ from ^ capsq) | to;
return (attacks_bb< ROOK>(ksq, b) & pieces( ROOK, QUEEN, us))
| (attacks_bb<BISHOP>(ksq, b) & pieces(BISHOP, QUEEN, us));
Square rfrom = to; // 'King captures the rook' notation
Square kto = relative_square(us, rfrom > kfrom ? SQ_G1 : SQ_C1);
Square rto = relative_square(us, rfrom > kfrom ? SQ_F1 : SQ_D1);
- Bitboard b = (occupied_squares() ^ kfrom ^ rfrom) | rto | kto;
+ Bitboard b = (pieces() ^ kfrom ^ rfrom) | rto | kto;
return attacks_bb<ROOK>(rto, b) & ksq;
}
from = from_sq(m);
to = to_sq(m);
capturedType = type_of(piece_on(to));
- occ = occupied_squares();
+ occ = pieces();
// Handle en passant moves
if (is_enpassant(m))
// The union of the white and black pieces must be equal to all
// occupied squares
- if ((pieces(WHITE) | pieces(BLACK)) != occupied_squares())
+ if ((pieces(WHITE) | pieces(BLACK)) != pieces())
return false;
// Separate piece type bitboards must have empty intersections