Initial Query

In python-chess I have a game = chess.pgn.read_game(pgn). How do I print the PGN notation for all prefixes of this game? Call your function print_all_prefixes(game). Do not give example code for how to run it.

LLM Generation

Query

In python-chess I have a game = chess.pgn.read_game(pgn). How do I print the PGN notation for all prefixes of this game? Call your function print_all_prefixes(game). Do not give example code for how to run it.

Output

To print the PGN notation for all prefixes of a game using python-chess, you can use the following function: 

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def print_all_prefixes(game):
    board = game.board()
    for move in game.mainline_moves():
        board.push(move)
        print(chess.Board.starting_fen())
        print(board.fen())
        print(chess.pgn.Game.from_board(board))
        print()
Explanation: 1. We start by creating a new chess board using `game.board()`. 2. We iterate over all the moves in the game's mainline using `game.mainline_moves()`. 3. For each move, we update the board by pushing the move using `board.push(move)`. 4. We print the starting FEN (Forsyth-Edwards Notation) of the game using `chess.Board.starting_fen()`. 5. We print the current FEN of the board after making the move using `board.fen()`. 6. We create a new `chess.pgn.Game` object from the current state of the board using `chess.pgn.Game.from_board(board)`, which generates the PGN notation for the game prefix up to the current move. 7. We print an empty line to separate the prefixes. This function will print the PGN notation for all prefixes of the game, starting from the initial position and progressively adding each move from the mainline. Note: Make sure to have the python-chess library installed (`pip install python-chess`) before running this code.

Extract Code

I extracted the following code from that output: 

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def print_all_prefixes(game):
    board = game.board()
    for move in game.mainline_moves():
        board.push(move)
        print(chess.Board.starting_fen())
        print(board.fen())
        print(chess.pgn.Game.from_board(board))
        print()

Run Code Interpreter

Running the following program: 

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def print_all_prefixes(game):
    board = game.board()
    for move in game.mainline_moves():
        board.push(move)
        print(chess.Board.starting_fen())
        print(board.fen())
        print(chess.pgn.Game.from_board(board))
        print()



import io
import chess.pgn
print_all_prefixes(chess.pgn.read_game(io.StringIO('1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3')))
And got the output: Traceback (most recent call last): File "/usr/src/app/main.py", line 15, in <module> print_all_prefixes(chess.pgn.read_game(io.StringIO('1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3'))) File "/usr/src/app/main.py", line 6, in print_all_prefixes print(chess.Board.starting_fen()) ^^^^^^^^^^^^^^^^^^^^^^^^^^ TypeError: 'str' object is not callable

PyFunc

Resulting in output: False

Initial Query

In python-chess I have a game = chess.pgn.read_game(pgn). How do I print the PGN notation for all prefixes of this game? Call your function print_all_prefixes(game). Do not give example code for how to run it.

LLM Generation

Query

In python-chess I have a game = chess.pgn.read_game(pgn). How do I print the PGN notation for all prefixes of this game? Call your function print_all_prefixes(game). Do not give example code for how to run it.

Output

Here's a function `print_all_prefixes(game)` that takes a `chess.Board` object representing a game and prints the PGN notation for all prefixes of the game: 

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import chess
import chess.pgn

def print_all_prefixes(game):
    board = game.board()
    moves = list(game.mainline_moves())
    
    for i in range(len(moves) + 1):
        board.reset()
        for move in moves[:i]:
            board.push(move)
        
        exporter = chess.pgn.StringExporter(headers=False, variations=False, comments=False)
        pgn = game.accept(exporter)
        
        print(pgn.split('\n\n')[0] + ' ' + board.fen())
Explanation: 1. We start by creating a new `chess.Board` object called `board` using `game.board()`. This represents the initial position of the game. 2. We extract all the moves of the game using `game.mainline_moves()` and convert it to a list called `moves`. 3. We iterate from 0 to the number of moves in the game (inclusive) using a `for` loop. 4. For each iteration: - We reset the `board` to the initial position using `board.reset()`. - We iterate over the moves up to index `i` (exclusive) and apply each move to the `board` using `board.push(move)`. This updates the `board` to the position after the moves. 5. We create a `chess.pgn.StringExporter` object called `exporter` with the specified options to control the output format of the PGN. In this case, we set `headers=False`, `variations=False`, and `comments=False` to exclude headers, variations, and comments from the PGN. 6. We use `game.accept(exporter)` to generate the PGN representation of the game up to the current position and store it in the `pgn` variable. 7. We split the `pgn` string by newline characters ('\n\n') and take the first part (index 0), which represents the move sequence. We concatenate it with a space and the FEN (Forsyth-Edwards Notation) representation of the current position obtained using `board.fen()`. 8. Finally, we print the resulting string, which represents the PGN notation for the prefix of the game up to the current position. This function will print the PGN notation for all prefixes of the game, starting from the initial position and incrementally adding moves until the end of the game.

Extract Code

I extracted the following code from that output: 

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import chess
import chess.pgn

def print_all_prefixes(game):
    board = game.board()
    moves = list(game.mainline_moves())
    
    for i in range(len(moves) + 1):
        board.reset()
        for move in moves[:i]:
            board.push(move)
        
        exporter = chess.pgn.StringExporter(headers=False, variations=False, comments=False)
        pgn = game.accept(exporter)
        
        print(pgn.split('\n\n')[0] + ' ' + board.fen())

Run Code Interpreter

Running the following program: 

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import chess
import chess.pgn

def print_all_prefixes(game):
    board = game.board()
    moves = list(game.mainline_moves())
    
    for i in range(len(moves) + 1):
        board.reset()
        for move in moves[:i]:
            board.push(move)
        
        exporter = chess.pgn.StringExporter(headers=False, variations=False, comments=False)
        pgn = game.accept(exporter)
        
        print(pgn.split('\n\n')[0] + ' ' + board.fen())



import io
import chess.pgn
print_all_prefixes(chess.pgn.read_game(io.StringIO('1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3')))
And got the output: 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * rnbqkbnr/pppppppp/8/8/8/5N2/PPPPPPPP/RNBQKB1R b KQkq - 1 1 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * rnbqkb1r/pppppppp/5n2/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq - 2 2 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * rnbqkb1r/pppppppp/5n2/8/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq - 0 2 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * rnbqkb1r/pppppp1p/5np1/8/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq - 0 3 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * rnbqkb1r/pppppp1p/5np1/8/2P5/2N2N2/PP1PPPPP/R1BQKB1R b KQkq - 1 3 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * rnbqk2r/ppppppbp/5np1/8/2P5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq - 2 4 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * rnbqk2r/ppppppbp/5np1/8/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq - 0 4 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * rnbq1rk1/ppppppbp/5np1/8/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQ - 1 5 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * rnbq1rk1/ppppppbp/5np1/8/2PP1B2/2N2N2/PP2PPPP/R2QKB1R b KQ - 2 5 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * rnbq1rk1/ppp1ppbp/5np1/3p4/2PP1B2/2N2N2/PP2PPPP/R2QKB1R w KQ - 0 6 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * rnbq1rk1/ppp1ppbp/5np1/3p4/2PP1B2/1QN2N2/PP2PPPP/R3KB1R b KQ - 1 6 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * rnbq1rk1/ppp1ppbp/5np1/8/2pP1B2/1QN2N2/PP2PPPP/R3KB1R w KQ - 0 7 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * rnbq1rk1/ppp1ppbp/5np1/8/2QP1B2/2N2N2/PP2PPPP/R3KB1R b KQ - 0 7 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * rnbq1rk1/pp2ppbp/2p2np1/8/2QP1B2/2N2N2/PP2PPPP/R3KB1R w KQ - 0 8 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * rnbq1rk1/pp2ppbp/2p2np1/8/2QPPB2/2N2N2/PP3PPP/R3KB1R b KQ - 0 8 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * r1bq1rk1/pp1nppbp/2p2np1/8/2QPPB2/2N2N2/PP3PPP/R3KB1R w KQ - 1 9 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * r1bq1rk1/pp1nppbp/2p2np1/8/2QPPB2/2N2N2/PP3PPP/3RKB1R b K - 2 9 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * r1bq1rk1/pp2ppbp/1np2np1/8/2QPPB2/2N2N2/PP3PPP/3RKB1R w K - 3 10 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * r1bq1rk1/pp2ppbp/1np2np1/2Q5/3PPB2/2N2N2/PP3PPP/3RKB1R b K - 4 10 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * r2q1rk1/pp2ppbp/1np2np1/2Q5/3PPBb1/2N2N2/PP3PPP/3RKB1R w K - 5 11 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * r2q1rk1/pp2ppbp/1np2np1/2Q3B1/3PP1b1/2N2N2/PP3PPP/3RKB1R b K - 6 11 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * r2q1rk1/pp2ppbp/2p2np1/2Q3B1/n2PP1b1/2N2N2/PP3PPP/3RKB1R w K - 7 12 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * r2q1rk1/pp2ppbp/2p2np1/6B1/n2PP1b1/Q1N2N2/PP3PPP/3RKB1R b K - 8 12 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * r2q1rk1/pp2ppbp/2p2np1/6B1/3PP1b1/Q1n2N2/PP3PPP/3RKB1R w K - 0 13 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * r2q1rk1/pp2ppbp/2p2np1/6B1/3PP1b1/Q1P2N2/P4PPP/3RKB1R b K - 0 13 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * r2q1rk1/pp2ppbp/2p3p1/6B1/3Pn1b1/Q1P2N2/P4PPP/3RKB1R w K - 0 14 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * r2q1rk1/pp2Bpbp/2p3p1/8/3Pn1b1/Q1P2N2/P4PPP/3RKB1R b K - 0 14 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * r4rk1/pp2Bpbp/1qp3p1/8/3Pn1b1/Q1P2N2/P4PPP/3RKB1R w K - 1 15 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * r4rk1/pp2Bpbp/1qp3p1/8/2BPn1b1/Q1P2N2/P4PPP/3RK2R b K - 2 15 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * r4rk1/pp2Bpbp/1qp3p1/8/2BP2b1/Q1n2N2/P4PPP/3RK2R w K - 0 16

PyFunc

Resulting in output: True

Initial Query

In python-chess I have a game = chess.pgn.read_game(pgn). How do I print the PGN notation for all prefixes of this game? Call your function print_all_prefixes(game). Do not give example code for how to run it.

LLM Generation

Query

In python-chess I have a game = chess.pgn.read_game(pgn). How do I print the PGN notation for all prefixes of this game? Call your function print_all_prefixes(game). Do not give example code for how to run it.

Output

To print the PGN notation for all prefixes of a chess game using python-chess, you can use the following function: 

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import chess
import chess.pgn

def print_all_prefixes(game):
    board = game.board()
    moves = list(game.mainline_moves())
    
    for i in range(len(moves) + 1):
        print(chess.Board().variation_san(moves[:i]))
        print()
Here's how the function works: 1. We create a new `chess.Board()` object called `board` to represent the initial position of the game. 2. We retrieve the list of moves in the mainline of the game using `game.mainline_moves()` and store it in the `moves` variable. 3. We iterate over the range from 0 to the number of moves in the game (inclusive) using a `for` loop. 4. For each iteration: - We use `chess.Board().variation_san(moves[:i])` to generate the PGN notation for the prefix of the game up to the current move index `i`. The `variation_san()` method takes a sequence of moves and returns the PGN notation for that variation. - We print the PGN notation for the current prefix. - We print an empty line to separate each prefix. 5. The function will print the PGN notation for all prefixes of the game, starting from the initial position (empty prefix) and progressing until the complete game. Note: This function assumes that the `game` parameter is a valid `chess.pgn.Game` object obtained from parsing a PGN file or string using `chess.pgn.read_game()`.

Extract Code

I extracted the following code from that output: 

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import chess
import chess.pgn

def print_all_prefixes(game):
    board = game.board()
    moves = list(game.mainline_moves())
    
    for i in range(len(moves) + 1):
        print(chess.Board().variation_san(moves[:i]))
        print()

Run Code Interpreter

Running the following program: 

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import chess
import chess.pgn

def print_all_prefixes(game):
    board = game.board()
    moves = list(game.mainline_moves())
    
    for i in range(len(moves) + 1):
        print(chess.Board().variation_san(moves[:i]))
        print()



import io
import chess.pgn
print_all_prefixes(chess.pgn.read_game(io.StringIO('1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3')))
And got the output: 1. Nf3 1. Nf3 Nf6 1. Nf3 Nf6 2. c4 1. Nf3 Nf6 2. c4 g6 1. Nf3 Nf6 2. c4 g6 3. Nc3 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3

PyFunc

Resulting in output: True

Initial Query

In python-chess I have a game = chess.pgn.read_game(pgn). How do I print the PGN notation for all prefixes of this game? Call your function print_all_prefixes(game). Do not give example code for how to run it.

LLM Generation

Query

In python-chess I have a game = chess.pgn.read_game(pgn). How do I print the PGN notation for all prefixes of this game? Call your function print_all_prefixes(game). Do not give example code for how to run it.

Output

Here's a function `print_all_prefixes(game)` that prints the PGN notation for all prefixes of a given game using the python-chess library: 

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import chess
import chess.pgn

def print_all_prefixes(game):
    board = game.board()
    moves = list(game.mainline_moves())
    pgn = chess.pgn.Game()

    print("Initial position:")
    print(board)
    print()

    for i in range(len(moves)):
        move = moves[i]
        board.push(move)
        
        # Create a new game object for the current prefix
        prefix_game = chess.pgn.Game()
        prefix_game.setup(board.fen())
        
        # Add the moves to the prefix game
        node = prefix_game
        for move in moves[:i+1]:
            node = node.add_variation(move)
        
        # Print the PGN representation of the prefix game
        print(f"Prefix after move {i+1}:")
        print(prefix_game)
        print()
Explanation: 1. We start by getting the initial board position using `game.board()` and creating a list of moves from the mainline of the game using `list(game.mainline_moves())`. 2. We create a new `chess.pgn.Game()` object called `pgn` to store the PGN representation of the game. 3. We print the initial board position. 4. We iterate over the moves of the game using a `for` loop with index `i`. 5. For each move, we push it onto the board using `board.push(move)` to update the board position. 6. We create a new `chess.pgn.Game()` object called `prefix_game` to represent the prefix of the game up to the current move. 7. We set up the initial position of `prefix_game` using `prefix_game.setup(board.fen())` with the current board position in FEN notation. 8. We add the moves up to the current move to `prefix_game` using a nested loop. We start from the root node of `prefix_game` and add each move as a variation using `node.add_variation(move)`. 9. Finally, we print the PGN representation of the prefix game using `print(prefix_game)`. This function will print the PGN notation for all prefixes of the given game, starting from the initial position and adding one move at a time until the full game is reached.

Extract Code

I extracted the following code from that output: 

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import chess
import chess.pgn

def print_all_prefixes(game):
    board = game.board()
    moves = list(game.mainline_moves())
    pgn = chess.pgn.Game()

    print("Initial position:")
    print(board)
    print()

    for i in range(len(moves)):
        move = moves[i]
        board.push(move)
        
        # Create a new game object for the current prefix
        prefix_game = chess.pgn.Game()
        prefix_game.setup(board.fen())
        
        # Add the moves to the prefix game
        node = prefix_game
        for move in moves[:i+1]:
            node = node.add_variation(move)
        
        # Print the PGN representation of the prefix game
        print(f"Prefix after move {i+1}:")
        print(prefix_game)
        print()

Run Code Interpreter

Running the following program: 

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import chess
import chess.pgn

def print_all_prefixes(game):
    board = game.board()
    moves = list(game.mainline_moves())
    pgn = chess.pgn.Game()

    print("Initial position:")
    print(board)
    print()

    for i in range(len(moves)):
        move = moves[i]
        board.push(move)
        
        # Create a new game object for the current prefix
        prefix_game = chess.pgn.Game()
        prefix_game.setup(board.fen())
        
        # Add the moves to the prefix game
        node = prefix_game
        for move in moves[:i+1]:
            node = node.add_variation(move)
        
        # Print the PGN representation of the prefix game
        print(f"Prefix after move {i+1}:")
        print(prefix_game)
        print()



import io
import chess.pgn
print_all_prefixes(chess.pgn.read_game(io.StringIO('1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3')))
And got the output: Initial position: r n b q k b n r p p p p p p p p . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P P P P P P P P R N B Q K B N R Prefix after move 1: Traceback (most recent call last): File "/usr/src/app/main.py", line 36, in <module> print_all_prefixes(chess.pgn.read_game(io.StringIO('1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3'))) File "/usr/src/app/main.py", line 29, in print_all_prefixes print(prefix_game) File "/usr/local/lib/python3.11/dist-packages/chess/pgn.py", line 638, in __str__ return self.accept(StringExporter(columns=None)) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/dist-packages/chess/pgn.py", line 883, in accept self.variations[0]._accept(board, visitor) File "/usr/local/lib/python3.11/dist-packages/chess/pgn.py", line 756, in _accept top.node._accept_node(parent_board, visitor) File "/usr/local/lib/python3.11/dist-packages/chess/pgn.py", line 733, in _accept_node visitor.visit_move(parent_board, self.move) File "/usr/local/lib/python3.11/dist-packages/chess/pgn.py", line 1403, in visit_move self.write_token(board.san(move) + " ") ^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/dist-packages/chess/__init__.py", line 2866, in san return self._algebraic(move) ^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/dist-packages/chess/__init__.py", line 2879, in _algebraic san = self._algebraic_and_push(move, long=long) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/dist-packages/chess/__init__.py", line 2884, in _algebraic_and_push san = self._algebraic_without_suffix(move, long=long) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.11/dist-packages/chess/__init__.py", line 2920, in _algebraic_without_suffix assert piece_type, f"san() and lan() expect move to be legal or null, but got {move} in {self.fen()}" AssertionError: san() and lan() expect move to be legal or null, but got g1f3 in rnbqkbnr/pppppppp/8/8/8/5N2/PPPPPPPP/RNBQKB1R b KQkq - 1 1

PyFunc

Resulting in output: False

Initial Query

In python-chess I have a game = chess.pgn.read_game(pgn). How do I print the PGN notation for all prefixes of this game? Call your function print_all_prefixes(game). Do not give example code for how to run it.

LLM Generation

Query

In python-chess I have a game = chess.pgn.read_game(pgn). How do I print the PGN notation for all prefixes of this game? Call your function print_all_prefixes(game). Do not give example code for how to run it.

Output

Here's a Python function that takes a `chess.Game` object and prints the PGN notation for all prefixes of the game: 

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import chess
import chess.pgn

def print_all_prefixes(game):
    board = game.board()
    for move in game.mainline_moves():
        board.push(move)
        exporter = chess.pgn.StringExporter(headers=False, variations=False, comments=False)
        pgn = game.accept(exporter)
        print(pgn)
Explanation: 1. We start by creating a new `chess.Board` object called `board`, which represents the initial position of the game. 2. We iterate over each move in the game's mainline using `game.mainline_moves()`. This returns an iterator over the moves in the game's main variation. 3. For each move, we update the `board` by pushing the move onto it using `board.push(move)`. This applies the move to the board, advancing the game state. 4. We create a `chess.pgn.StringExporter` object called `exporter`. This exporter is configured to exclude headers, variations, and comments from the exported PGN. 5. We use `game.accept(exporter)` to export the current game state up to the current move as a PGN string. The `accept` method takes an exporter object and returns the exported result. 6. We print the exported PGN string using `print(pgn)`. This outputs the PGN notation for the current prefix of the game. By iterating over each move in the game's mainline and exporting the game state at each step, we obtain the PGN notation for all prefixes of the game. Each prefix represents the game state up to a specific move. Note that this function assumes that the input `game` object represents a valid game with a mainline variation. If the game contains variations or sub-variations, they will be ignored, and only the mainline moves will be considered.

Extract Code

I extracted the following code from that output: 

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import chess
import chess.pgn

def print_all_prefixes(game):
    board = game.board()
    for move in game.mainline_moves():
        board.push(move)
        exporter = chess.pgn.StringExporter(headers=False, variations=False, comments=False)
        pgn = game.accept(exporter)
        print(pgn)

Run Code Interpreter

Running the following program: 

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import chess
import chess.pgn

def print_all_prefixes(game):
    board = game.board()
    for move in game.mainline_moves():
        board.push(move)
        exporter = chess.pgn.StringExporter(headers=False, variations=False, comments=False)
        pgn = game.accept(exporter)
        print(pgn)



import io
import chess.pgn
print_all_prefixes(chess.pgn.read_game(io.StringIO('1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3')))
And got the output: 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 * 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 O-O 5. Bf4 d5 6. Qb3 dxc4 7. Qxc4 c6 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 *

PyFunc

Resulting in output: True