def attacked(pos, sq, opp_cl=None):
if opp_cl is None:
opp_cl = not pos.color
opp_occ = pos.color_bbs[opp_cl]
if ATTACKS[piece.KING][sq] & opp_occ & pos.piece_bbs[piece.KING]:
return True
if ATTACKS[piece.KNIGHT][sq] & opp_occ & pos.piece_bbs[piece.KNIGHT]:
return True
for pc in (piece.ROOK, piece.BISHOP):
occ = pos.occupied & MASK[pc][sq]
pcs_or_qs = pos.piece_bbs[piece.QUEEN] | pos.piece_bbs[pc]
if OCC_ATTACKS[pc][sq][occ] & opp_occ & pcs_or_qs:
return True
if opp_cl:
pawn_attacks = square.sw(sq) | square.se(sq)
else:
pawn_attacks = square.nw(sq) | square.ne(sq)
if pawn_attacks & opp_occ & pos.piece_bbs[piece.PAWN]:
return True
return False
def attacked(pos, sq, opp_cl=None):
if opp_cl is None:
opp_cl = not pos.color
opp_occ = pos.color_bbs[opp_cl]
if ATTACKS[piece.KING][sq] & opp_occ & pos.piece_bbs[piece.KING]:
return True
if ATTACKS[piece.KNIGHT][sq] & opp_occ & pos.piece_bbs[piece.KNIGHT]:
return True
for pc in (piece.ROOK, piece.BISHOP):
occ = pos.occupied & MASK[pc][sq]
pcs_or_qs = pos.piece_bbs[piece.QUEEN] | pos.piece_bbs[pc]
if OCC_ATTACKS[pc][sq][occ] & opp_occ & pcs_or_qs:
return True
if opp_cl:
pawn_attacks = square.sw(sq) | square.se(sq)
else:
pawn_attacks = square.nw(sq) | square.ne(sq)
if pawn_attacks & opp_occ & pos.piece_bbs[piece.PAWN]:
return True
return False
def get_pawn_moves(pos, moves):
pawns = pos.piece_bbs[piece.PAWN] & pos.color_bbs[pos.color]
not_occ = ~(pos.occupied)
enp = pos.enp
opp_occ = pos.color_bbs[not pos.color] | enp
if pos.color:
# single pawn moves
regular = pawns & ~square.BIT_RANKS[6]
promoting = pawns & square.BIT_RANKS[6]
single = bitboard.n(pawns) & not_occ
for sq in bitboard.squares(single):
moves.append(move.mv(piece.PAWN, square.s(sq), sq))
for sq in bitboard.squares(bitboard.n(promoting) & not_occ):
_make_promotions(moves, sq, square.s(sq))
# east attacks
for sq in bitboard.squares(bitboard.ne(regular) & opp_occ):
prm = piece.PAWN if sq == enp else piece.NONE
moves.append(move.mv(piece.PAWN, square.sw(sq), sq, prm))
for sq in bitboard.squares(bitboard.ne(promoting) & opp_occ):
_make_promotions(moves, sq, square.sw(sq))
# west attacks
for sq in bitboard.squares(bitboard.nw(regular) & opp_occ):
prm = piece.PAWN if sq == enp else piece.NONE
moves.append(move.mv(piece.PAWN, square.se(sq), sq, prm))
for sq in bitboard.squares(bitboard.nw(promoting) & opp_occ):
_make_promotions(moves, sq, square.se(sq))
# double pawn moves
doubles = bitboard.n(single & square.BIT_RANKS[2])
for sq in bitboard.squares(doubles & not_occ):
moves.append(move.mv(piece.PAWN, square.ss(sq), sq))
else:
# single pawn moves
regular = pawns & ~square.BIT_RANKS[1]
promoting = pawns & square.BIT_RANKS[1]
single = bitboard.s(pawns) & not_occ
for sq in bitboard.squares(single):
moves.append(move.mv(piece.PAWN, square.n(sq), sq))
for sq in bitboard.squares(bitboard.s(promoting) & not_occ):
_make_promotions(moves, sq, square.n(sq))
# east attacks
for sq in bitboard.squares(bitboard.se(regular) & opp_occ):
prm = piece.PAWN if sq == enp else piece.NONE
moves.append(move.mv(piece.PAWN, square.nw(sq), sq, prm))
for sq in bitboard.squares(bitboard.se(promoting) & opp_occ):
_make_promotions(moves, sq, square.nw(sq))
# west attacks
for sq in bitboard.squares(bitboard.sw(regular) & opp_occ):
prm = piece.PAWN if sq == enp else piece.NONE
moves.append(move.mv(piece.PAWN, square.ne(sq), sq, prm))
for sq in bitboard.squares(bitboard.sw(promoting) & opp_occ):
_make_promotions(moves, sq, square.ne(sq))
# double pawn moves
doubles = bitboard.s(single & square.BIT_RANKS[5])
for sq in bitboard.squares(doubles & not_occ):
moves.append(move.mv(piece.PAWN, square.nn(sq), sq))
def _king_moves(sq):
return (square.n(sq) | square.s(sq) | square.e(sq) | square.w(sq)
| square.ne(sq) | square.se(sq) | square.sw(sq) | square.nw(sq))
def get_pawn_moves(pos, moves):
pawns = pos.piece_bbs[piece.PAWN] & pos.color_bbs[pos.color]
not_occ = ~(pos.occupied)
enp = pos.enp
opp_occ = pos.color_bbs[not pos.color] | enp
if pos.color:
# single pawn moves
regular = pawns & ~square.BIT_RANKS[6]
promoting = pawns & square.BIT_RANKS[6]
single = bitboard.n(pawns) & not_occ
for sq in bitboard.squares(single):
moves.append(move.mv(piece.PAWN, square.s(sq), sq))
for sq in bitboard.squares(bitboard.n(promoting) & not_occ):
_make_promotions(moves, sq, square.s(sq))
# east attacks
for sq in bitboard.squares(bitboard.ne(regular) & opp_occ):
prm = piece.PAWN if sq == enp else piece.NONE
moves.append(move.mv(piece.PAWN, square.sw(sq), sq, prm))
for sq in bitboard.squares(bitboard.ne(promoting) & opp_occ):
_make_promotions(moves, sq, square.sw(sq))
# west attacks
for sq in bitboard.squares(bitboard.nw(regular) & opp_occ):
prm = piece.PAWN if sq == enp else piece.NONE
moves.append(move.mv(piece.PAWN, square.se(sq), sq, prm))
for sq in bitboard.squares(bitboard.nw(promoting) & opp_occ):
_make_promotions(moves, sq, square.se(sq))
# double pawn moves
doubles = bitboard.n(single & square.BIT_RANKS[2])
for sq in bitboard.squares(doubles & not_occ):
moves.append(move.mv(piece.PAWN, square.ss(sq), sq))
else:
# single pawn moves
regular = pawns & ~square.BIT_RANKS[1]
promoting = pawns & square.BIT_RANKS[1]
single = bitboard.s(pawns) & not_occ
for sq in bitboard.squares(single):
moves.append(move.mv(piece.PAWN, square.n(sq), sq))
for sq in bitboard.squares(bitboard.s(promoting) & not_occ):
_make_promotions(moves, sq, square.n(sq))
# east attacks
for sq in bitboard.squares(bitboard.se(regular) & opp_occ):
prm = piece.PAWN if sq == enp else piece.NONE
moves.append(move.mv(piece.PAWN, square.nw(sq), sq, prm))
for sq in bitboard.squares(bitboard.se(promoting) & opp_occ):
_make_promotions(moves, sq, square.nw(sq))
# west attacks
for sq in bitboard.squares(bitboard.sw(regular) & opp_occ):
prm = piece.PAWN if sq == enp else piece.NONE
moves.append(move.mv(piece.PAWN, square.ne(sq), sq, prm))
for sq in bitboard.squares(bitboard.sw(promoting) & opp_occ):
_make_promotions(moves, sq, square.ne(sq))
# double pawn moves
doubles = bitboard.s(single & square.BIT_RANKS[5])
for sq in bitboard.squares(doubles & not_occ):
moves.append(move.mv(piece.PAWN, square.nn(sq), sq))
def _king_moves(sq):
return (square.n(sq) | square.s(sq) | square.e(sq) | square.w(sq) |
square.ne(sq) | square.se(sq) | square.sw(sq) | square.nw(sq))