def testMaterial(board):
""" Tests if no players are able to win the game from the current
position """
whiteBoards = board.boards[WHITE]
blackBoards = board.boards[BLACK]
if bitLength(whiteBoards[PAWN]) or bitLength(blackBoards[PAWN]):
return False
if bitLength(whiteBoards[QUEEN]) or bitLength(blackBoards[QUEEN]):
return False
wn = bitLength(whiteBoards[KNIGHT])
wb = bitLength(whiteBoards[BISHOP])
wr = bitLength(whiteBoards[ROOK])
bn = bitLength(blackBoards[KNIGHT])
bb = bitLength(blackBoards[BISHOP])
br = bitLength(blackBoards[ROOK])
if (wn, wb, wr, 0, bn, bb, br, 0) in drawSet:
return True
# Tests KBKB. Draw if bishops are of same color
if not wn + wr + bn + wr and wb == 1 and bb == 1:
if whiteBoards[BISHOP] & BLACK_SQUARES and True != \
blackBoards[BISHOP] & BLACK_SQUARES and True:
return True
def testMaterial (board):
""" Tests if no players are able to win the game from the current
position """
whiteBoards = board.boards[WHITE]
blackBoards = board.boards[BLACK]
if bitLength(whiteBoards[QUEEN]) > 0 or bitLength(whiteBoards[ROOK]) or \
bitLength(blackBoards[QUEEN]) > 0 or bitLength(blackBoards[ROOK]):
return False
wp = bitLength(whiteBoards[PAWN])
bp = bitLength(blackBoards[PAWN])
if wp > 0 or bp > 0:
return False
wn = bitLength(whiteBoards[KNIGHT])
wb = bitLength(whiteBoards[BISHOP])
bn = bitLength(blackBoards[KNIGHT])
bb = bitLength(blackBoards[BISHOP])
# Tests: KK, KBK, KKB, KNK, KKN
if wn + wb + bn + bb <= 1:
return True
# Tests KBKB
if wn == 0 and bn == 0 and wb == 1 and bb == 1:
# Draw if bishops are of same color
if (whiteBoards[BISHOP] & BLACK_SQUARES and BLACK or WHITE) == \
(blackBoards[BISHOP] & BLACK_SQUARES and BLACK or WHITE):
return True
def testMaterial (board):
""" Tests if no players are able to win the game from the current
position """
whiteBoards = board.boards[WHITE]
blackBoards = board.boards[BLACK]
if bitLength(whiteBoards[PAWN]) or bitLength(blackBoards[PAWN]):
return False
if bitLength(whiteBoards[QUEEN]) or bitLength(blackBoards[QUEEN]):
return False
wn = bitLength(whiteBoards[KNIGHT])
wb = bitLength(whiteBoards[BISHOP])
wr = bitLength(whiteBoards[ROOK])
bn = bitLength(blackBoards[KNIGHT])
bb = bitLength(blackBoards[BISHOP])
br = bitLength(blackBoards[ROOK])
if (wn, wb, wr, 0, bn, bb, br, 0) in drawSet:
return True
# Tests KBKB. Draw if bishops are of same color
if not wn + wr + bn + wr and wb == 1 and bb == 1:
if whiteBoards[BISHOP] & BLACK_SQUARES and True != \
blackBoards[BISHOP] & BLACK_SQUARES and True:
return True
def testPlayerMatingMaterial(board, color):
""" Tests if given color has enough material to mate on board """
boards = board.boards[color]
if bitLength(boards[PAWN]) or bitLength(boards[QUEEN]) \
or bitLength(boards[ROOK]) \
or (bitLength(boards[KNIGHT]) + bitLength(boards[BISHOP]) > 1):
return True
return False
def testPlayerMatingMaterial (board, color):
""" Tests if given color has enough material to mate on board """
boards = board.boards[color]
if bitLength(boards[PAWN]) or bitLength(boards[QUEEN]) \
or bitLength(boards[ROOK]) \
or (bitLength(boards[KNIGHT]) + bitLength(boards[BISHOP]) > 1):
return True
return False
