def create_fen(pieces):
""" Create a random FEN position using given pieces """
pos = pieces.rfind("k")
pieces = pieces[:pos], pieces[pos:]
ok = False
while not ok:
lboard = LBoard()
lboard.applyFen("8/8/8/8/8/8/8/8 w - - 0 1")
bishop_cords = [[], []]
bishop_colors_ok = True
cords = list(range(0, 64))
pawn_cords = list(range(0 + 8, 64 - 8))
# Order of color is important here to prevent offering
# positions with trivial captures in first move
for color in (WHITE, BLACK):
for char in pieces[color]:
piece = chrU2Sign[char.upper()]
attacked = True
limit = 100
while attacked and limit > 0:
cord = random.choice(pawn_cords if char == "p" else cords)
attacked = isAttacked(lboard, cord, 1 - color)
limit -= 1
lboard._addPiece(cord, piece, color)
cords.remove(cord)
if cord in pawn_cords:
pawn_cords.remove(cord)
if char == "b":
bishop_cords[color].append(cord)
# 2 same color bishop is not ok
if len(bishop_cords[color]) == 2 and bishop_colors_ok:
b0, b1 = bishop_cords[color]
b0_color = BLACK if RANK(b0) % 2 == FILE(b0) % 2 else WHITE
b1_color = BLACK if RANK(b1) % 2 == FILE(b1) % 2 else WHITE
if b0_color == b1_color:
bishop_colors_ok = False
break
ok = (not lboard.isChecked()) and (
not lboard.opIsChecked()) and bishop_colors_ok
fen = lboard.asFen()
return fen
def create_fen(pieces):
""" Create a random FEN position using given pieces """
pos = pieces.rfind("k")
pieces = pieces[:pos], pieces[pos:]
ok = False
while not ok:
lboard = LBoard()
lboard.applyFen("8/8/8/8/8/8/8/8 w - - 0 1")
bishop_cords = [[], []]
bishop_colors_ok = True
cords = list(range(0, 64))
pawn_cords = list(range(0 + 8, 64 - 8))
for color in (BLACK, WHITE):
for char in pieces[color]:
piece = chrU2Sign[char.upper()]
cord = random.choice(pawn_cords if char == "p" else cords)
lboard._addPiece(cord, piece, color)
cords.remove(cord)
if cord in pawn_cords:
pawn_cords.remove(cord)
if char == "b":
bishop_cords[color].append(cord)
# 2 same color bishop is not ok
if len(bishop_cords[color]) == 2 and bishop_colors_ok:
b0, b1 = bishop_cords[color]
b0_color = BLACK if RANK(b0) % 2 == FILE(b0) % 2 else WHITE
b1_color = BLACK if RANK(b1) % 2 == FILE(b1) % 2 else WHITE
if b0_color == b1_color:
bishop_colors_ok = False
break
ok = (not lboard.isChecked()) and (not lboard.opIsChecked()) and bishop_colors_ok
fen = lboard.asFen()
return fen
def scoreAllMoves(self, board, probeSoft=False):
global URL, expression, PROMOTION_FLAGS
fen = board.asFen().split()[0] + " w - - 0 1"
if (fen, board.color) in self.table:
return self.table[(fen, board.color)]
if probeSoft or not conf.get("online_egtb_check"):
return []
def get_data(URL, fen):
# Request the page
url = (URL + fen).replace(" ", "%20")
try:
f = urlopen(url)
except IOError as e:
log.warning(
"Unable to read endgame tablebase from the Internet: %s" %
repr(e))
data = b""
data = f.read()
return data
loop = asyncio.get_event_loop()
future = loop.run_in_executor(None, get_data, URL, fen)
data = yield from future
# Parse
for color, move_data in enumerate(data.split(b"\nNEXTCOLOR\n")):
try:
moves = []
for fcord, tcord, promotion, result in expression.findall(
move_data.decode()):
fcord = int(fcord)
tcord = int(tcord)
if promotion:
flag = PROMOTION_FLAGS[int(promotion)]
elif RANK(fcord) != RANK(tcord) and FILE(fcord) != FILE(tcord) and \
board.arBoard[fcord] == PAWN and board.arBoard[tcord] == EMPTY:
flag = ENPASSANT
else:
flag = NORMAL_MOVE
move = newMove(fcord, tcord, flag)
if result == "Draw":
state = DRAW
steps = 0
else:
s, steps = result.split(" in ")
steps = int(steps)
if result.startswith("Win"):
if color == WHITE:
state = WHITEWON
else:
state = BLACKWON
elif result.startswith("Lose"):
if color == WHITE:
state = BLACKWON
else:
state = WHITEWON
moves.append((move, state, steps))
if moves:
self.table[(fen, color)] = moves
elif color == board.color and board.opIsChecked():
log.warning("Asked endgametable for a won position: %s" %
fen)
elif color == board.color:
log.warning(
"Couldn't get %s data for position %s.\nData was: %s" %
(reprColor[color], fen, repr(data)))
except (KeyError, ValueError):
log.warning(
"Couldn't parse %s data for position %s.\nData was: %s" %
(reprColor[color], fen, repr(data)))
self.table[(fen, color)] = [] # Don't try again.
if (fen, board.color) in self.table:
return self.table[(fen, board.color)]
return []
repr(e))
return []
data = f.read()
# Parse
for color, move_data in enumerate(data.split("\nNEXTCOLOR\n")):
try:
moves = []
for fcord, tcord, promotion, result in expression.findall(
move_data):
fcord = int(fcord)
tcord = int(tcord)
if promotion:
flag = PROMOTION_FLAGS[int(promotion)]
elif RANK(fcord) != RANK(tcord) and FILE(fcord) != FILE(tcord) and \
board.arBoard[fcord] == PAWN and board.arBoard[tcord] == EMPTY:
flag = ENPASSANT
else:
flag = NORMAL_MOVE
move = newMove(fcord, tcord, flag)
if result == "Draw":
state = DRAW
steps = 0
else:
s, steps = result.split(" in ")
steps = int(steps)
if result.startswith("Win"):