def parse_position(pgn_position: pgn.ChildNode,
is_mainline: bool) -> SerializablePosition:
nonlocal current_index
nonlocal all_positions
index = current_index
current_index += 1
next_pos_index = None
if pgn_position.variations:
next_pos_index = parse_position(pgn_position.variations[0],
True).index
variations_indexes = []
if len(pgn_position.variations) > 1:
variations_indexes = [
parse_position(p, False).index
for i, p in enumerate(pgn_position.variations) if i > 0
]
position = SerializablePosition(
index=index,
next_position_index=next_pos_index,
variations_indexes=variations_indexes,
nags=list(pgn_position.nags),
fen=pgn_position.board().fen(),
comment=pgn_position.comment,
commentBefore=pgn_position.starting_comment,
san=pgn_position.san(),
is_mainline=is_mainline,
move=Move(from_square=square_name(pgn_position.move.from_square),
to=square_name(pgn_position.move.to_square),
promotion=pgn_position.move.promotion))
all_positions.insert(0, position)
return position
def getNextState(self, board, player, action):
# Copy board to new board
b = board.copy()
origin = np.where(self.VALIDS_INDEX == action)[0][0]
destination = np.where(self.VALIDS_INDEX == action)[1][0]
origin_name = chess.square_name(origin)
destination_name = chess.square_name(destination)
move = "".join([origin_name, destination_name])
# print(move)
is_promotion = (b.piece_at(origin).piece_type == chess.PAWN and chess.square_rank(destination) in [0, 7])
if is_promotion:
move = str(move + 'q')
move = chess.Move.from_uci(move)
# print(move)
# print(list(board.legal_moves))
b.push(move)
# print(b.mirror(), -player)
return b.mirror(), -player
def update_hashcode_zobriest(piece, board, h, hashTurn, piece_hash, move):
"""
Update hashcode of a board with Zobriest Hashing
Need to call this function before using board.push(move).
:param board:
:param h:
:param move:
:return:
"""
to_col = board.color_at(move.to_square)
to_col = get_color_code(to_col)
to_piece = board.piece_type_at(move.to_square)
from_uci = chess.square_name(move.from_square)
x1 = d[from_uci[0]]
y1 = d[from_uci[1]]
to_uci = chess.square_name(move.to_square)
x2 = d[to_uci[0]]
y2 = d[to_uci[1]]
indice_color = 0 if board.turn else 1 #True = White
h = h ^ piece_hash[(piece - 1) + 6 * indice_color][x1][y1]
h = h ^ piece_hash[(piece - 1) + 6 * indice_color][x2][y2]
h = h ^ hashTurn
if (to_col == 1):
h = h ^ piece_hash[(to_piece - 1)][x2][y2]
elif (to_col == 2):
h = h ^ piece_hash[(to_piece - 1) + 6][x2][y2]
return h
def update_hashcode(piece, board, h, hashTable, hashTurn, move):
"""
Update hashcode of a board.
Need to call this function before using board.push(move).
:param board:
:param h:
:param move:
:return:
"""
col = board.color_at(move.to_square)
col = get_color_code(col)
from_uci = chess.square_name(move.from_square)
x1 = d[from_uci[0]]
y1 = d[from_uci[1]]
to_uci = chess.square_name(move.to_square)
x2 = d[to_uci[0]]
y2 = d[to_uci[1]]
move_color = get_color_code(board.turn)
if col != None:
h = h ^ hashTable[col][x2][y2][piece - 1]
h = h ^ hashTable[move_color][x2][y2][piece - 1]
h = h ^ hashTable[move_color][x1][y1][piece - 1]
h = h ^ hashTurn
return h
def action_to_uci(self, action):
origin = np.where(self.VALIDS_INDEX == action)[0][0]
destination = np.where(self.VALIDS_INDEX == action)[1][0]
origin_name = chess.square_name(origin)
destination_name = chess.square_name(destination)
move = "".join([origin_name, destination_name])
return move
def get_move_list(board):
move_list = {}
for move in list(board.legal_moves):
start_square = chess.square_name(move.from_square)
if start_square in move_list.keys():
move_list[start_square].append(chess.square_name(move.to_square))
else:
move_list[start_square] = [chess.square_name(move.to_square)]
return move_list
def knight_moves():
out = []
for i in range(64):
start = chess.square_name(i)
# Up
if chess.square_rank(i) < 6:
if chess.square_file(i) != 7:
out.append(start + chess.square_name(i + 17))
if chess.square_file(i) != 0:
out.append(start + chess.square_name(i + 15))
# Right
if chess.square_file(i) < 6:
if chess.square_rank(i) != 7:
out.append(start + chess.square_name(i + 10))
if chess.square_rank(i) != 0:
out.append(start + chess.square_name(i - 6))
# Down
if chess.square_rank(i) > 1:
if chess.square_file(i) != 7:
out.append(start + chess.square_name(i - 15))
if chess.square_file(i) != 0:
out.append(start + chess.square_name(i - 17))
# Left
if chess.square_file(i) > 1:
if chess.square_rank(i) != 7:
out.append(start + chess.square_name(i + 6))
if chess.square_rank(i) != 0:
out.append(start + chess.square_name(i - 10))
return out
def make_move(move_str, board, driver):
move = util.parse_move(move_str, board)
start_sq = chess.square_name(move.from_square)
end_sq = chess.square_name(move.to_square)
start_el = util.get_square_el(start_sq, driver)
util.sleep_random(5, 10)
util.click_el(start_el, driver)
util.sleep_random(0.1, 1.5)
end_el = util.get_square_el(end_sq, driver)
util.click_el(end_el, driver)
board.push(move)
def get_pieces(board):
white_pieces = {}
black_pieces = {}
for piece in PIECES:
ps = board.pieces(piece, chess.WHITE)
squares = [chess.square_name(s) for s in ps]
white_pieces[piece] = squares
ps = board.pieces(piece, chess.BLACK)
squares = [chess.square_name(s) for s in ps]
black_pieces[piece] = squares
return white_pieces, black_pieces
def add_turn_to_file(board: b.ChessBoard, file_name: str = 'game_results.txt'):
"""Adds a new turn to a file that has already been initialised.
The `seek()` function is used to update two characters in the board.
:param board: Current state of the board
:param file_name: Name of the file to be saved
:raises IOError: If the file has not been initialised
"""
if not os.path.exists(f'results/{file_name}'):
raise IOError('The file specified does not exist')
current_move = board.board.peek()
from_square = chess.square_name(current_move.from_square)
to_square = chess.square_name(current_move.to_square)
current_piece_from = board.get_piece_at(square=from_square)
current_piece_to = board.get_piece_at(square=to_square)
with open(file=f'results/{file_name}', mode='r+', encoding='utf-8') as f:
current_line = f.readline()
while 'Current state of the board:' not in current_line:
current_line = f.readline()
# jump two 2 newline characters
# we have reached the line containing the board
initial_cursor = f.seek(f.tell() + 2)
# get "from" position that needs to be updated
squares_one_line = board.squares_one_line
from_pos = squares_one_line.index(from_square)
# seek "from" position
f.seek(initial_cursor + from_pos)
# replace "from" square
if current_piece_from:
f.write(str(current_piece_from))
else:
f.write('.')
# get "to" position
to_pos = squares_one_line.index(to_square)
# seek "to" position
f.seek(initial_cursor + to_pos)
# replace "to" square
if current_piece_to:
f.write(str(current_piece_to))
else:
f.write('.')
def post():
""" Sets chess play in the Core """
data = request.get_json()
required_validation = ErrorUtil.isRequired('move', data['move'])
if not required_validation['valid']:
return required_validation['response']
session_key = BoardSessions.getBoardSession(request.referrer)
core = ChessCore.getBoard(session_key)
try:
parsed_move = core.board.parse_san(data['move'])
except ValueError:
return Lib.resInvalidJson('invalid Move')
castling = core.getCastlingMove(parsed_move, color=core.getTurn())
# removes castling rights
move = core.movePiece(data['move'], session_key=session_key)
res = {'status': 1, 'data': chess.square_name(move.to_square)}
if castling['castling']:
res['castling'] = True
res['castlingMove'] = castling['castlingMove']
return Lib.resJson(res)
def populate_move_from(self):
self.comboBoxMoveFrom.clear()
a = str(self.board.legal_moves)
b = a[a.index('(') + 1:a.index(')')].split(', ')
l = []
if self.checkBoxUciSan.checkState():
for move in b:
move_piece = move[0] if len(move) > 2 else 'P'
#move_piece = chess.PIECE_NAMES[chess.PIECE_SYMBOLS.index(move_piece.lower())]
if move_piece not in l:
l.append(move_piece)
self.comboBoxMoveFrom.addItem(move_piece)
else:
for move in self.board.legal_moves:
move_from = chess.square_name(move.from_square).upper()
if move_from not in l:
l.append(move_from)
self.comboBoxMoveFrom.addItem(move_from)
if len(l) > 0:
self.comboBoxMoveFrom.setCurrentIndex(0)
self.populate_move_to()
def getBoardDetails(self):
boardData = {
'black': [],
'white': []
}
legal_moves = self.getLegalMoves()
legal_moves_starter = [m.uci()[0:2] for m in legal_moves]
legal_moves_ender = [m.uci()[2:4] for m in legal_moves]
for i in range(64):
pieceType = self.__board.piece_type_at(i)
pieceColor = self.__board.color_at(i)
piecePosition = chess.square_name(i)
if pieceColor != None:
if pieceColor:
pieceClass = 'black'
else:
pieceClass = 'white'
possibleVictims = [p for p in self.__board.attacks(i) if not self.__board.color_at(p) and chess.square_name(p) in legal_moves_ender ]
possibleAttacker = [a for a in self.__board.attackers(not self.AI_color,i) if chess.square_name(a) in legal_moves_starter ]
boardData[pieceClass].append({
'type': pieceTypes[pieceType-1],
'position': piecePosition,
'attacks': possibleVictims,
'attackers': possibleAttacker
})
return boardData
def getStringArray(aBoard):
boardArray = []
for key in aBoard.piece_map():
boardArray.append(aBoard.piece_map()[key].symbol() + "@" +
chess.square_name(key))
return boardArray
def get_all_moves():
"""return all possible moves in the baord and map those to squares"""
num_moves = 0
moves = []
# for x in range(8):
for x, f in enumerate(chess.FILE_NAMES):
# for y in range(8):
for y, r in enumerate(chess.RANK_NAMES):
# print(x, y)
# knight moves
kmoves = [(2, 1), (1, 2), (-1, 2), (-2, 1), (-2, -1), (-1, -2),
(1, -2), (2, -1)]
for mv in kmoves:
if 7 >= x + mv[0] >= 0 and 7 >= y + mv[1] >= 0:
sq = chess.square(x + mv[0], y + mv[1])
moves.append("{}{}{}".format(f, r, chess.square_name(sq)))
for i in range(8):
# hv moves
if i != x:
sq = chess.square(i, y)
moves.append("{}{}{}".format(f, r, chess.square_name(sq)))
if i != y:
sq = chess.square(x, i)
moves.append("{}{}{}".format(f, r, chess.square_name(sq)))
# diag moves --> flip x, ys
directions = list(
map(list, [
zip(range(x + 1, 8), range(y + 1, 8)),
zip(range(x + 1, 8), range(y - 1, -1, -1)),
zip(range(x - 1, -1, -1), range(y + 1, 8)),
zip(range(x - 1, -1, -1), range(y - 1, -1, -1)),
]))
diag_moves = []
for d in directions:
diag_moves.extend(d)
for i, mv in enumerate(diag_moves):
sq = chess.square(*mv)
if sq == "{}{}".format(f, r):
continue
diag_moves[i] = "{}{}{}".format(f, r, chess.square_name(sq))
moves.extend(diag_moves)
moves_idx = {mv: i for i, mv in enumerate(moves)}
return moves_idx
def calculate_min_max_tree(state, env, player, depth, mode):
evaluations = []
legal_moves = [state.san(x) for x in env.legal_moves]
evals = []
#Move Ordering
if player == 'white':
opp = False
else:
opp = True
#checkmate
moves = [x for x in legal_moves if '#' in x]
#check
moves2 = [x for x in legal_moves if '+' in x]
for m in moves2:
moves.append(m)
#capture
for i in [5, 4, 3, 2, 1]: #1=pawn
#find the oppenent piece
squares = state.pieces(i, opp)
square_list = [chess.square_name(square) for square in squares]
#for square in squares:
# square_list.append(square)
#chess.square_name(21)
#see if we are attacking it
for j in square_list:
capt = [x for x in legal_moves if 'x' + str(j) in x]
for k in capt:
moves.append(k)
#moves = legal_moves
myset = set(moves)
legal_moves = list(myset)
if len(legal_moves) == 0:
legal_moves = [state.san(x) for x in env.legal_moves]
for move in legal_moves:
state_new = copy.deepcopy(state)
env_new = copy.deepcopy(env)
action = state_new.push_san(move)
state_new, reward, done, _ = env_new.step(action)
#best_move = Search(depth=5, player ='white', env=env, state=state)
best_eval = AlphaSearch(depth=depth,
player='white',
env=env_new,
state=state_new,
alpha=-10000,
beta=10000,
evaluations=evaluations,
max_depth=depth,
mode=mode)
if player == 'black':
best_eval = -best_eval
evals.append(best_eval)
print(evals, legal_moves)
best_move = legal_moves[evals.index(max(evals))]
return best_move
def post_options(board, tweet_id):
order = [chess.QUEEN, chess.KING, chess.ROOK, chess.BISHOP, chess.KNIGHT, chess.PAWN]
moves = {chess.piece_name(p).title(): [] for p in order}
piece_map = board.piece_map()
for m in list(board.legal_moves):
piece = chess.piece_name(piece_map[m.from_square].piece_type).title()
moves[piece].append(m)
poll_ids = []
for p in moves:
if len(moves[p]) <= 0:
continue
op = []
for m in moves[p]:
f = chess.square_name(m.from_square).upper()
t = chess.square_name(m.to_square).upper()
if m.promotion:
prom = chess.piece_name(m.promotion).title()
op.append(move_msg_prom.format(p, f, t, prom))
continue
op.append(move_msg.format(p, f, t))
# Make sure we don't leave a poll with only 1 options (tweeter doesn't accept this)
if len(op) % 4 == 1:
op.append(filler_text)
op = [op[i:i + 4] for i in range(0, len(op), 4)]
head_tweet_id = post_tweet(p + " Moves:", reply_id=tweet_id, entries=op.pop(0))
if not head_tweet_id:
poll_ids.append(tweet_id)
panic_clean_tweets(poll_ids)
poll_ids.append(head_tweet_id)
for poll_ops in op:
head_tweet_id = post_tweet(p + " cont...", reply_id=head_tweet_id, entries=poll_ops)
if not head_tweet_id:
poll_ids.append(tweet_id)
panic_clean_tweets(poll_ids)
poll_ids.append(head_tweet_id)
return poll_ids
def queen_moves():
out = []
for i in range(64):
start = chess.square_name(i)
# Left -> Right
rank_start = (i // 8) * 8
for j in range(rank_start, rank_start + 8):
if i == j:
continue
end = chess.square_name(j)
out.append(start + end)
# Bottom -> Top
file_start = i % 8
for j in range(file_start, 64, 8):
if i == j:
continue
end = chess.square_name(j)
out.append(start + end)
# Diagonal 1
if i != 7 and i != 56:
if chess.square_rank(i) == 7 or chess.square_file(i) == 7:
align = i - 9
else:
align = i + 9
diagonal = list(chess.SquareSet.ray(i, align))
for j in diagonal:
if i == j:
continue
end = chess.square_name(j)
out.append(start + end)
# Diagonal 2
if i != 0 and i != 63:
if chess.square_rank(i) == 7 or chess.square_file(i) == 0:
align = i - 7
else:
align = i + 7
diagonal = list(chess.SquareSet.ray(i, align))
for j in diagonal:
if i == j:
continue
end = chess.square_name(j)
out.append(start + end)
return out
def get_piece_positions(self, is_white: bool):
board = self.get_board()
piece_map = board.piece_map()
pos_list = list()
colour_to_look_for = chess.WHITE if is_white else chess.BLACK
for pos, piece in piece_map.items():
if piece.color == colour_to_look_for:
pos_list.append(chess.square_name(pos))
return pos_list
def get_current_positions(board, color):
positions = []
for i in range(64):
piece = board.piece_at(i)
if piece is None:
continue
if piece.color != (color == 'white'):
continue
positions.append((chess.square_name(i), piece_code(piece.piece_type)))
return positions
def populate_move_to(self):
self.comboBoxMoveTo.clear()
a = str(self.board.legal_moves)
b = a[a.index('(') + 1:a.index(')')].split(', ')
if len(self.comboBoxMoveFrom.currentText()) and self.checkBoxUciSan.checkState():
for move in b:
if len(move) <= 2 and (self.comboBoxMoveFrom.currentText().startswith('P')):
self.comboBoxMoveTo.addItem(move)
elif move.startswith(self.comboBoxMoveFrom.currentText()[0]):
self.comboBoxMoveTo.addItem(move[1::])
else:
for move in self.board.legal_moves:
move_from = chess.square_name(move.from_square).upper()
move_to = chess.square_name(move.to_square).upper()
if move_from == self.comboBoxMoveFrom.currentText():
self.comboBoxMoveTo.addItem(move_to)
def pawn_promos(color):
out = []
if color == chess.WHITE:
a = 48
b = 56
else:
a = 8
b = 16
for i in range(a, b):
if color == chess.WHITE:
left = max(56, i + 7)
right = min(63, i + 9) + 1
else:
left = max(0, i - 9)
right = min(7, i - 7) + 1
for j in range(left, right):
for p in ["q", "r", "b", "n"]:
out.append(chess.square_name(i) + chess.square_name(j) + p)
return out
def get_attack_from_pos_svg(self, is_white: bool, attack_from_square: str):
positions_to_attack_from = self.get_piece_positions(is_white)
if attack_from_square not in positions_to_attack_from:
raise Exception("Square: " + attack_from_square +
" is not one of possible squares to attack from.")
board = self.get_board()
squares_to_move_to = set()
squares_to_move_to_names = list()
for move in board.legal_moves:
if chess.square_name(move.from_square) == attack_from_square:
squares_to_move_to.add(move.to_square)
squares_to_move_to_names.append(
chess.square_name(move.to_square))
colour = chess.WHITE if is_white else chess.BLACK
board_svg = str(
chess.svg.board(board,
orientation=colour,
size=GameManager.SIZE_OF_SVG,
squares=squares_to_move_to))
return (board_svg, positions_to_attack_from, squares_to_move_to_names)
def detect_initial_changes(self):
self.current_state = self.image.snap()
for rank in range(2, 4):
for file in range(0, 8):
coordinates = self.scan_region[rank, file]
region_changes = 0
for index in range(self.scan_region_area):
x, y = coordinates[index]
pixel = self.current_state.pixel(x - self.board_x,
y - self.board_y)
if BoardImage.is_close(pixel, self.light_square_color) or \
BoardImage.is_close(pixel, self.dark_square_color):
pass
else:
region_changes += 1
print("-> ", (rank, file), region_changes)
if region_changes >= self.region_threshold:
if self.is_animating:
if self.current_state.pixels == self.animating_state.pixels:
self.is_animating = False
self.set_animating_state(None)
else:
self.set_animating_state(self.current_state)
return None
else:
self.is_animating = True
self.set_animating_state(self.current_state)
return None
square_name = chess.square_name(
Chessboard.get_square(rank, file, self.board.color))
if square_name in ("a3", "c3", "h3",
"f3"): # It might be a pawn move
x, y = self.square_centers[rank - 1, file]
pixel = self.current_state.pixel(
x - self.board_x, y - self.board_y)
if BoardImage.is_close(pixel, self.light_square_color) or \
BoardImage.is_close(pixel, self.dark_square_color):
# Pawn move
move = square_name # Did this just to remind myself
else:
# Knight move
move = "N" + square_name
elif square_name in Chessboard.LEGAL_FIRST_MOVES:
move = square_name # Did this just to remind myself
else:
self.interface.log(
"Move detected was not a legal move.",
level="error")
raise RuntimeError(
"Error: Move detected was not a legal move.")
self.interface.log(f"Opponent move: {move}")
uci_string = Chessboard.LEGAL_FIRST_MOVES_UCI[
Chessboard.LEGAL_FIRST_MOVES.index(move)]
return chess.Move.from_uci(uci_string)
def helper_adv(G, piece, square_name, node_name):
board = chess.Board(None)
piece = chess.Piece.from_symbol(piece)
square = chess.parse_square(square_name)
board.set_piece_at(square, piece)
attacks = board.attacks(square)
for sq in attacks:
square_name = chess.square_name(sq)
for node in G.nodes():
if node.endswith(square_name):
G.add_edge(node, node_name)
def get_aggregate(pgn_filename, player_name):
full_aggregates = {'white': [], 'black': []}
with open(pgn_filename) as pgn_file:
while True:
game = chess.pgn.read_game(pgn_file)
if game is None:
break
print(game.headers['Date'])
color = 'white' if player_name in game.headers['White'] else 'black'
color_aggregates = full_aggregates[color]
turns_mod = 0 if color == 'white' else 1
board = game.board()
for i, move in enumerate(list(game.mainline_moves())):
board.push(move)
if i % 2 != turns_mod:
continue
move_index = i // 2
# Either this index is a new maximum game length for existing
# aggregates (so it'll be appended to the list), or it's already
# in the list, but it cannot be further than the list.
assert move_index <= len(color_aggregates)
if move_index == len(color_aggregates):
color_aggregates.append({})
aggregate = color_aggregates[move_index]
square = chess.square_name(move.from_square)
piece = piece_code(board.piece_type_at(move.to_square))
direction = get_direction_from_move(move)
datapoints = [(square, piece, direction)]
# Taking the rook into account for castling
if piece == 'K' and get_file_diff(move) > 1:
datapoints.append(CASTLING_ROOK_DATAPOINTS[(color,
direction)])
for square, piece, direction in datapoints:
aggregate.setdefault(square, {}).setdefault(direction,
{}).setdefault(
piece, 0)
aggregate[square][direction][piece] += 1
# Positional aggregates
positions = get_current_positions(board, color)
for square, piece in positions:
aggregate.setdefault(square, {}).setdefault('_',
{}).setdefault(
piece, 0)
aggregate[square]['_'][piece] += 1
return full_aggregates
def shalloweval(self, piececolor):
if (self.draw):
return 0
eval = 0
is_endgame = self.e.is_endgame(self.getfen())
valfinder = SquareValue()
#loop through each square of the board
#If a piece exists, add it's value to the eval
outcome = self.board.outcome(claim_draw=False)
if (outcome):
if (outcome.winner == piececolor): #bot wins
eval = 20000
elif (outcome.winner == (not piececolor)): #opponent wins
eval = -20000
else:
eval = 0
else:
i = 0
while (i < 64):
piece = self.getpiece(i)
if (piece):
value = valfinder.getpiecevalue(i, piececolor, piece,
is_endgame)
eval += value
if ((piece.piece_type > 1) and piece.piece_type < 6):
if (piece.color != self.board.turn):
attackers = list(
self.board.attackers(
(not (piece.color)),
chess.parse_square(chess.square_name(i))))
#defenders = list(self.board.attackers((piece.color), chess.parse_square(chess.square_name(i))))
j = 0
while (j < len(attackers)):
#if len(defenders) == 0:
# eval -= value
# break
att = abs(
valfinder.getpiecevalue(
attackers[j], piececolor,
self.board.piece_at(attackers[j]),
is_endgame))
#att = self.getpiece(attackers[j]).piece_type
if (abs(value) > att):
#if piece.piece_type >= att:
if (abs(value) - abs(att) >= 100):
eval -= value
break
j += 1
i = i + 1
return eval
def findColorOfSquares(board):
whiteAttackersPerSquare={}
blackAttackersPerSquare={}
for square in chess.SQUARES:
whiteAttackersPerSquare[square]=(len(board.attackers(chess.WHITE, square)))
blackAttackersPerSquare[square]=(len(board.attackers(chess.BLACK, square)))
highlightSquareComment=[]
squareColorWhiteWinning='G'
squareColorBlackWinning='R'
for square in chess.SQUARES:
if whiteAttackersPerSquare[square] > blackAttackersPerSquare[square]:
if blackAttackersPerSquare[square]!=0:
highlightSquareComment.append(squareColorWhiteWinning+chess.square_name(square))
elif whiteAttackersPerSquare[square] < blackAttackersPerSquare[square]:
if whiteAttackersPerSquare[square] !=0:
highlightSquareComment.append(squareColorBlackWinning+chess.square_name(square))
else:
if whiteAttackersPerSquare[square] != 0:
highlightSquareComment.append('Y' + chess.square_name(square))
return highlightSquareComment
def canvasTouch(self, e):
# get id of canvas item closest to click point
# if that item is tagged with 'piece', get the next item
# under that, i.e. the square
sqId = self.find_closest(e.x, e.y, 0, 'piece')[0]
# The 2nd tag of a square is always its name, i.e. 'e4'
sqName = self.gettags(sqId)[1]
# A move is already in progress, so this is the second touch
if self.MiP:
# is this the same square clicked the last time?
# if so, we'll unhighlight everything and return
isSameSq = sqId == self.MiP[0][0]
# unhighlight the from square
self.itemconfigure(self.MiP[0][0], width=0)
# unhighlight each to square
for m in self.MiP:
# if this finishes one of the legal moves, make it!
if self.gettags(m[1])[1] == sqName:
self.makeHumanMove(m[2])
self.itemconfigure(m[1], width=0)
self.MiP = []
return
# To make it here, this is first touch.
# Iterate all the legal moves in the position,
# and highlight the potential landing squares
board = self.boardPane.curNode.board()
for move in board.legal_moves:
if chess.square_name(move.from_square) == sqName:
fSqId = self.find_withtag(sqName)[0]
self.itemconfigure(fSqId,
outline=self.settings['hlSqColor'],
width=4)
tSqId = self.find_withtag(chess.square_name(move.to_square))[0]
self.itemconfigure(tSqId,
outline=self.settings['hlSqColor'],
width=4)
self.MiP.append((fSqId, tSqId, move))
def _update_initial_positions(self, move, side) -> None:
"""Updates the square to initial position dict."""
to = chess.square_name(move.to_square)
from_ = chess.square_name(move.from_square)
# save the captured piece's initial position
captured_initial_position = self._initial_positions.get(to, None)
# update the dictionary
self._initial_positions[to] = self._initial_positions[from_]
del (self._initial_positions[from_])
# if taking, then should remove piece from dict, which already happens
# check if castling to update rook
if self._board.is_castling(move):
rank = '1' if side == WHITE else '8'
if self._board.is_kingside_castling(move):
# rook must be on file h because hasn't moved
old_rook_pos = 'h' + rank
new_rook_pos = 'f' + rank
self._initial_positions[new_rook_pos] = old_rook_pos
del (self._initial_positions[old_rook_pos])
else:
# queenside castling
# rook must be on file a because hasn't moved
old_rook_pos = 'a' + rank
new_rook_pos = 'd' + rank
self._initial_positions[new_rook_pos] = old_rook_pos
del (self._initial_positions[old_rook_pos])
# check if en_passant
if self._board.is_en_passant(move):
en_passant_square = self._get_en_passant_square()
del self._initial_positions[en_passant_square]
return captured_initial_position
