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importchessPGNToMoves
importchessPieceCanCapture
importchessCanMoveToPos
importchessEnPassant
fromcollectionsimportOrderedDict
NEWLINE, END_OF_RANK, SEPARATOR, EMPTY_SQUARE, EN_PASSANT, CHECK='\n', 'h', '|', '_', 'ep', '+'
CASTLING_QUEENS_SIDE= {'O': {'K': ('e1', 'c1'), 'R': ('a1', 'd1')}, 'o': {
'k': ('e8', 'c8'), 'r': ('a8', 'd8')}}
CASTLING_KINGS_SIDE= {'O': {'K': ('e1', 'g1'), 'R': ('h1', 'f1')}, 'o': {
'k': ('e8', 'g8'), 'r': ('h8', 'f8')}}
WHITE_MOVE_TEXT='*'*16+NEWLINE+' WHITE\'S MOVE'+NEWLINE+'*'*16
BLACK_MOVE_TEXT='*'*16+NEWLINE+' BLACK\'S MOVE'+NEWLINE+'*'*16
WHITE_PIECES='BKNPQR'
BLACK_PIECES='bknpqr'
defsetup():
squares= [y+xforxin'12345678'foryin'abcdefgh']
start='RNBQKBNR'+'P'*8+EMPTY_SQUARE*8+EMPTY_SQUARE* \
8+EMPTY_SQUARE*8+EMPTY_SQUARE*8+'p'*8+'rnbqkbnr'
board_view=OrderedDict(zip(squares, start))
piece_view= {_: [] for_in'BKNPQRbknpqr'}
forsquareinsquares:
piece=board_view[square]
ifpiece!=EMPTY_SQUARE:
piece_view[piece].append(square)
piece_view[EN_PASSANT] =''
returnboard_view, piece_view
defis_rook_jumping_pieces(board_view, square_at, square_to_go):
rank_difference=int(square_at[1])-int(square_to_go[1])
ifrank_difference==0:
files_arr= [chr(i)
foriinrange(ord(square_at[0]), ord(square_to_go[0]))]
foriinfiles_arr[1:]:
ifboard_view[i+square_at[1]] !='_':
returnTrue
else:
step=1ifrank_difference>0else-1
foriinrange(int(square_at[1])+1, int(square_to_go[1]), step):
ifboard_view[square_at[0]+str(i)] !='_':
returnTrue
returnFalse
defremove_movement_ambiguity(board_view, piece_view, piece, square_to_go, current_file_or_rank):
forsquare_atinpiece_view[piece]:
ifpiece.lower() =='p':
ifcurrent_file_or_rankinsquare_atandchessEnPassant.is_en_passant(piece, square_at, square_to_go):
piece_view[EN_PASSANT] =square_to_go
returnupdate_board_piece_view(board_view, piece_view, piece, square_at, square_to_go)
ifcurrent_file_or_rankinsquare_atandchessCanMoveToPos.isMoveValid(piece, square_at, square_to_go):
returnupdate_board_piece_view(board_view, piece_view, piece, square_at, square_to_go)
defupdate_board_piece_view(board_view, piece_view, piece, square_at, square_to_go):
board_view[square_to_go] =piece
board_view[square_at] =EMPTY_SQUARE
piece_view[piece].remove(square_at)
piece_view[piece].append(square_to_go)
returnboard_view, piece_view
defremove_capture_ambiguity(board_view, piece_view, piece, square_to_go, current_file_or_rank):
forsquare_atinpiece_view[piece]:
ifpiece_view[EN_PASSANT] !=''andpiece.lower() =='p':
ifcurrent_file_or_rankinsquare_atandchessEnPassant.can_capture_en_passant(piece, piece_view[EN_PASSANT], square_at, square_to_go):
piece_view=remove_captured_piece(
board_view, piece_view, piece_view[EN_PASSANT])
board_view[piece_view[EN_PASSANT]] =EMPTY_SQUARE
piece_view[EN_PASSANT] =''
returnupdate_board_piece_view(board_view, piece_view, piece, square_at, square_to_go)
ifcurrent_file_or_rankinsquare_atandchessPieceCanCapture.canPieceCapture(piece, square_at, square_to_go):
piece_view=remove_captured_piece(
board_view, piece_view, square_to_go)
returnupdate_board_piece_view(board_view, piece_view, piece, square_at, square_to_go)
defremove_captured_piece(board_view, piece_view, square_to_go):
piece_captured=board_view[square_to_go]
piece_view[piece_captured].remove(square_to_go)
returnpiece_view
defcapture(board_view, piece_view, move):
piece, square_to_go=move[0], move[-2:]
ifmove!=piece+square_to_go:
returnremove_capture_ambiguity(board_view, piece_view, piece, square_to_go, move.replace(piece, '').replace(square_to_go, ''))
forsquare_atinpiece_view[piece]:
ifpiece_view[EN_PASSANT] !=''andpiece.lower() =='p':
ifchessEnPassant.can_capture_en_passant(piece, piece_view[EN_PASSANT], square_at, square_to_go):
piece_view=remove_captured_piece(
board_view, piece_view, piece_view[EN_PASSANT])
board_view[piece_view[EN_PASSANT]] =EMPTY_SQUARE
piece_view[EN_PASSANT] =''
returnupdate_board_piece_view(board_view, piece_view, piece, square_at, square_to_go)
ifchessPieceCanCapture.canPieceCapture(piece, square_at, square_to_go):
ifpiece.lower() =='r'andis_rook_jumping_pieces(board_view, square_at, square_to_go):
continue
piece_view=remove_captured_piece(
board_view, piece_view, square_to_go)
returnupdate_board_piece_view(board_view, piece_view, piece, square_at, square_to_go)
defmovement(board_view, piece_view, move):
piece, square_to_go=move[0], move[-2:]
ifmove!=piece+square_to_go:
returnremove_movement_ambiguity(board_view, piece_view, piece, square_to_go, move.replace(piece, '').replace(square_to_go, ''))
forsquare_atinpiece_view[piece]:
ifpiece.lower() =='p':
ifchessEnPassant.is_en_passant(piece, square_at, square_to_go):
piece_view[EN_PASSANT] =square_to_go
returnupdate_board_piece_view(board_view, piece_view, piece, square_at, square_to_go)
ifchessCanMoveToPos.isMoveValid(piece, square_at, square_to_go):
ifpiece.lower() =='r'andis_rook_jumping_pieces(board_view, square_at, square_to_go):
continue
returnupdate_board_piece_view(board_view, piece_view, piece, square_at, square_to_go)
defcastling_update_piece(board_view, piece_view, piece, castling_side, castling_player):
returnupdate_board_piece_view(
board_view, piece_view, piece, castling_side[castling_player][piece][0], castling_side[castling_player][piece][1])
defcastling(board_view, piece_view, move):
castling_player=move[0]
ifcastling_player=='O':
king, rook='K', 'R'
else:
king, rook='k', 'r'
castling_side=CASTLING_KINGS_SIDEifmove.lower() =='o-o'elseCASTLING_QUEENS_SIDE
board_view, piece_view=castling_update_piece(
board_view, piece_view, king, castling_side, castling_player)
returncastling_update_piece(board_view, piece_view, rook, castling_side, castling_player)
defstatus_after_each_turn(board_view, piece_view, move):
if'x'inmove:
returncapture(board_view, piece_view, move.replace('x', ''))
if'o'inmove.lower():
returncastling(board_view, piece_view, move)
returnmovement(board_view, piece_view, move)
defprint_board(board_view):
board=''
files=''
forsquareinboard_view:
files+=board_view[square]+SEPARATOR
ifEND_OF_RANKinsquare:
board+=files[::-1]+SEPARATOR+NEWLINE
files=''
return (board[::-1]).strip(NEWLINE)+NEWLINE
defgame(moves):
board_view, piece_view=setup()
all_moves= []
formoveinmoves:
currentBoard='CHECK'+NEWLINEifCHECKinmoveelse''
board_view, piece_view=status_after_each_turn(
board_view, piece_view, move.strip(CHECK))
move_text=WHITE_MOVE_TEXTifmove[0] inWHITE_PIECESelseBLACK_MOVE_TEXT
currentBoard+=print_board(board_view)+move_text
all_moves.append(currentBoard)
returnall_moves
print(game(chessPGNToMoves.pre_process_moves())[-1])