def isUnderAttack(self, sq, color):
result = False
attack_diag = bb.diagonal_attacks_lr[sq][bb.getDiagonalByteLR(self.all_figures[const.BOTH], sq)] | \
bb.diagonal_attacks_rl[sq][bb.getDiagonalByteRL(self.all_figures[const.BOTH], sq)]
attack_rank_line = bb.line_attacks[sq][bb.getLineByte(self.all_figures[const.BOTH], bb.line(sq))] | \
bb.rank_attacks[sq][bb.getRankByte(self.all_figures[const.BOTH], bb.rank(sq))]
#check for enemys
if( bb.knight_attacks[sq] & self.figures[const.KNIGHT][not color] or \
bb.pawn_attacks[color][sq] & self.figures[const.PAWN][not color] or \
bb.king_attacks[sq] & self.figures[const.KING][not color] or \
attack_diag & self.figures[const.BISHOP][not color] or \
attack_diag & self.figures[const.QUEEN][not color] or \
attack_rank_line & self.figures[const.ROOK][not color] or \
attack_rank_line & self.figures[const.QUEEN][not color] ):
result = True
return result
def isUnderAttack(self, sq, color):
result = False
attack_diag = bb.diagonal_attacks_lr[sq][bb.getDiagonalByteLR(self.all_figures[const.BOTH], sq)] | \
bb.diagonal_attacks_rl[sq][bb.getDiagonalByteRL(self.all_figures[const.BOTH], sq)]
attack_rank_line = bb.line_attacks[sq][bb.getLineByte(self.all_figures[const.BOTH], bb.line(sq))] | \
bb.rank_attacks[sq][bb.getRankByte(self.all_figures[const.BOTH], bb.rank(sq))]
#check for enemys
if( bb.knight_attacks[sq] & self.figures[const.KNIGHT][not color] or \
bb.pawn_attacks[color][sq] & self.figures[const.PAWN][not color] or \
bb.king_attacks[sq] & self.figures[const.KING][not color] or \
attack_diag & self.figures[const.BISHOP][not color] or \
attack_diag & self.figures[const.QUEEN][not color] or \
attack_rank_line & self.figures[const.ROOK][not color] or \
attack_rank_line & self.figures[const.QUEEN][not color] ):
result = True
return result
def getPossibleMoves(self, color):
pieces = self.all_figures[color]
result = []
sq = 0
while(pieces and sq<64):
if(pieces & bb.mask64[sq]):
moves = 0
fig = abs(self.board[sq])
if(fig == const.PAWN ):
#single step
moves |= bb.pawn_singlestep[color][sq] & ~self.all_figures[const.BOTH]
#double step
if(moves):
moves |= bb.pawn_doublestep[color][sq] & ~self.all_figures[const.BOTH]
#capture
moves |= bb.pawn_attacks[color][sq] & self.all_figures[not color]
#en-passant capture
moves |= bb.pawn_attacks[color][sq] & ( self.note[0] << (40 if color==const.WHITE else 16))
elif(fig == const.KING ):
moves |= bb.king_attacks[sq] & ~self.all_figures[const.BOTH]
moves |= (bb.king_attacks[sq] & ~self.all_figures[color] ) & self.all_figures[not color]
#castling
for side in (const.CASTLING_LEFT, const.CASTLING_RIGHT):
if(not self.note[1][color][side] and \
not (bb.castling_no_fig[color][side] & self.all_figures[const.BOTH]) and \
not self.isUnderAttack(bb.castling_no_attack_sq[color][side], color) and \
not self.isUnderAttack(bb.castling_king_start_sq[color], color)):
moves |= bb.castling_king_dest[color][side]
else:
if(fig == const.KNIGHT):
moves |= bb.knight_attacks[sq]
else:
if(fig == const.BISHOP or fig == const.QUEEN):
moves |= bb.diagonal_attacks_lr[sq][bb.getDiagonalByteLR(self.all_figures[const.BOTH], sq)] | \
bb.diagonal_attacks_rl[sq][bb.getDiagonalByteRL(self.all_figures[const.BOTH], sq)]
if(fig == const.ROOK or fig == const.QUEEN):
moves |= bb.line_attacks[sq][bb.getLineByte(self.all_figures[const.BOTH], bb.line(sq))] | \
bb.rank_attacks[sq][bb.getRankByte(self.all_figures[const.BOTH], bb.rank(sq))]
moves &= ~self.all_figures[color]
dest = 0
while(moves and dest<64):
if(moves & bb.mask64[dest]):
move_type = const.NORMAL_MOVE
if(bb.mask64[dest] & self.all_figures[not color]):
move_type = const.CAPTURE
if(fig == const.KING and abs(bb.line(dest)-bb.line(sq)) == 2):
move_type = const.CASTLING
elif(fig == const.PAWN):
if(abs(bb.rank(dest)-bb.rank(sq))==2):
move_type = const.DOUBLE_STEP
elif(bb.line(dest) != bb.line(sq) and self.board[dest] == 0):
move_type = const.ENPASSANT_CAPTURE
elif(bb.rank(dest) == 7-7*color):
move_type = const.PROMOTION
move = move_type | (sq << const.MOVE_START[0]) | (dest << const.MOVE_DEST[0]) | (abs(self.board[sq]) << const.MOVE_FIG_START[0]) | (abs(self.board[dest]) << const.MOVE_FIG_CAPTURE[0]) | (color << const.MOVE_COLOR[0])
if(move_type == const.PROMOTION):
for fig_prom in (const.PROM_KNIGHT, const.PROM_BISHOP, const.PROM_ROOK, const.PROM_QUEEN):
result.append( move | (fig_prom << const.MOVE_PROM[0]) )
else:
result.append(move)
move ^= bb.mask64[dest]
dest +=1
pieces &= ~bb.mask64[sq]
sq += 1
return result
def getPossibleMoves(self, color):
pieces = self.all_figures[color]
result = []
sq = 0
while (pieces and sq < 64):
if (pieces & bb.mask64[sq]):
moves = 0
fig = abs(self.board[sq])
if (fig == const.PAWN):
#single step
moves |= bb.pawn_singlestep[color][sq] & ~self.all_figures[
const.BOTH]
#double step
if (moves):
moves |= bb.pawn_doublestep[color][
sq] & ~self.all_figures[const.BOTH]
#capture
moves |= bb.pawn_attacks[color][sq] & self.all_figures[
not color]
#en-passant capture
moves |= bb.pawn_attacks[color][sq] & (
self.note[0] << (40 if color == const.WHITE else 16))
elif (fig == const.KING):
moves |= bb.king_attacks[sq] & ~self.all_figures[
const.BOTH]
moves |= (bb.king_attacks[sq] & ~self.all_figures[color]
) & self.all_figures[not color]
#castling
for side in (const.CASTLING_LEFT, const.CASTLING_RIGHT):
if(not self.note[1][color][side] and \
not (bb.castling_no_fig[color][side] & self.all_figures[const.BOTH]) and \
not self.isUnderAttack(bb.castling_no_attack_sq[color][side], color) and \
not self.isUnderAttack(bb.castling_king_start_sq[color], color)):
moves |= bb.castling_king_dest[color][side]
else:
if (fig == const.KNIGHT):
moves |= bb.knight_attacks[sq]
else:
if (fig == const.BISHOP or fig == const.QUEEN):
moves |= bb.diagonal_attacks_lr[sq][bb.getDiagonalByteLR(self.all_figures[const.BOTH], sq)] | \
bb.diagonal_attacks_rl[sq][bb.getDiagonalByteRL(self.all_figures[const.BOTH], sq)]
if (fig == const.ROOK or fig == const.QUEEN):
moves |= bb.line_attacks[sq][bb.getLineByte(self.all_figures[const.BOTH], bb.line(sq))] | \
bb.rank_attacks[sq][bb.getRankByte(self.all_figures[const.BOTH], bb.rank(sq))]
moves &= ~self.all_figures[color]
dest = 0
while (moves and dest < 64):
if (moves & bb.mask64[dest]):
move_type = const.NORMAL_MOVE
if (bb.mask64[dest] & self.all_figures[not color]):
move_type = const.CAPTURE
if (fig == const.KING
and abs(bb.line(dest) - bb.line(sq)) == 2):
move_type = const.CASTLING
elif (fig == const.PAWN):
if (abs(bb.rank(dest) - bb.rank(sq)) == 2):
move_type = const.DOUBLE_STEP
elif (bb.line(dest) != bb.line(sq)
and self.board[dest] == 0):
move_type = const.ENPASSANT_CAPTURE
elif (bb.rank(dest) == 7 - 7 * color):
move_type = const.PROMOTION
move = move_type | (sq << const.MOVE_START[0]) | (
dest << const.MOVE_DEST[0]) | (abs(
self.board[sq]) << const.MOVE_FIG_START[0]) | (
abs(self.board[dest]) <<
const.MOVE_FIG_CAPTURE[0]) | (
color << const.MOVE_COLOR[0])
if (move_type == const.PROMOTION):
for fig_prom in (const.PROM_KNIGHT,
const.PROM_BISHOP,
const.PROM_ROOK,
const.PROM_QUEEN):
result.append(move | (
fig_prom << const.MOVE_PROM[0]))
else:
result.append(move)
move ^= bb.mask64[dest]
dest += 1
pieces &= ~bb.mask64[sq]
sq += 1
return result
