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import os
import chess
import chess.pgn
# credit code https://github.com/notnil/chess-gpt
def get_legal_moves(board):
"""Returns a list of legal moves in UCI notation."""
return list(map(board.san, board.legal_moves))
def init_game() -> tuple[chess.pgn.Game, chess.Board]:
"""Initializes a new game."""
board = chess.Board()
game = chess.pgn.Game()
game.headers["White"] = "User"
game.headers["Black"] = "Chess-engine"
del game.headers["Event"]
del game.headers["Date"]
del game.headers["Site"]
del game.headers["Round"]
del game.headers["Result"]
game.setup(board)
return game, board
def generate_prompt(game: chess.pgn.Game, board: chess.Board) -> str:
moves = get_legal_moves(board)
moves_str = ",".join(moves)
return f"""
The task is play a Chess game:
You are the Chess-engine playing a chess match against the user as black and trying to win.
The current FEN notation is:
{board.fen()}
The next valid moves are:
{moves_str}
Continue the game.
{str(game)[:-2]}"""
def get_move(content, moves):
lines = content.splitlines()
for line in lines:
for lm in moves:
if lm in line:
return lm
class ChessGame:
def __init__(self, docschatllm):
self.docschatllm = docschatllm
def start_game(self):
self.game, self.board = init_game()
self.game_cp, _ = init_game()
self.node = self.game
self.node_copy = self.game_cp
svg_board = chess.svg.board(self.board, size=350)
return svg_board, "Valid moves: "+",".join(get_legal_moves(self.board)) # display(self.board)
def user_move(self, move_input):
try:
self.board.push_san(move_input)
except ValueError:
print("Invalid move")
svg_board = chess.svg.board(self.board, size=350)
return svg_board, "Valid moves: "+",".join(get_legal_moves(self.board)), 'Invalid move'
self.node = self.node.add_variation(self.board.move_stack[-1])
self.node_copy = self.node_copy.add_variation(self.board.move_stack[-1])
if self.board.is_game_over():
svg_board = chess.svg.board(self.board, size=350)
return svg_board, ",".join(get_legal_moves(self.board)), 'GAME OVER'
prompt = generate_prompt(self.game, self.board)
print("Prompt: \n"+prompt)
print("#############")
for i in range(10): #tries
if i == 9:
svg_board = chess.svg.board(self.board, size=350)
return svg_board, ",".join(get_legal_moves(self.board)), "The model can't do a valid move. Restart the game"
try:
"""Returns the move from the prompt."""
content = self.docschatllm.llm.predict(prompt) ### from selected model ###
#print(moves)
print("Response: \n"+content)
print("#############")
moves = get_legal_moves(self.board)
move = get_move(content, moves)
print(move)
print("#############")
self.board.push_san(move)
break
except:
prompt = prompt[1:]
print("attempt a move.")
self.node = self.node.add_variation(self.board.move_stack[-1])
self.node_copy = self.node_copy.add_variation(self.board.move_stack[-1])
svg_board = chess.svg.board(self.board, size=350)
return svg_board, "Valid moves: "+",".join(get_legal_moves(self.board)), ''
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