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

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import chess.pgn

def print_all_prefixes(game):
    """Prints the PGN notation for all prefixes of a given chess game.

    Args:
        game: A chess.pgn.Game object.
    """

    node = game
    while node:
        print(game.game().end().board().variation_san(node.moves))  # Corrected line
        node = node.parent
The key change here is using `game.game().end().board().variation_san(node.moves)` instead of just `node.board().variation_san(node.moves)`. The `node.board()` method only gives you the board at the *current* node. To get the full PGN up to a given node, you need to start from the end of the game and work backward, building the variation SAN. The `game.game().end()` gets the final node of the game, and `.board()` gets the board at that node. Then, `variation_san(node.moves)` calculates the SAN string representing the moves needed to reach `node` from the end of the game. This effectively gives you the PGN for the prefix ending at `node`.

Extract Code

I extracted the following code from that output: 

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import chess.pgn

def print_all_prefixes(game):
    """Prints the PGN notation for all prefixes of a given chess game.

    Args:
        game: A chess.pgn.Game object.
    """

    node = game
    while node:
        print(game.game().end().board().variation_san(node.moves))  # Corrected line
        node = node.parent

Run Code Interpreter

Running the following program: 

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import chess.pgn

def print_all_prefixes(game):
    """Prints the PGN notation for all prefixes of a given chess game.

    Args:
        game: A chess.pgn.Game object.
    """

    node = game
    while node:
        print(game.game().end().board().variation_san(node.moves))  # Corrected line
        node = node.parent



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 20, 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 13, in print_all_prefixes print(game.game().end().board().variation_san(node.moves)) # Corrected line ^^^^^^^^^^ AttributeError: 'Game' object has no attribute 'moves'. Did you mean: 'move'?

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

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import chess.pgn

def print_all_prefixes(game):
    """Prints all prefixes of a chess game in PGN notation."""

    node = game
    while node:
        print(game.game().end().board().variation_san(node.mainline_moves()))
        print()  # Add a newline for readability between variations
        node = node.parent

Extract Code

I extracted the following code from that output: 

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import chess.pgn

def print_all_prefixes(game):
    """Prints all prefixes of a chess game in PGN notation."""

    node = game
    while node:
        print(game.game().end().board().variation_san(node.mainline_moves()))
        print()  # Add a newline for readability between variations
        node = node.parent

Run Code Interpreter

Running the following program: 

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import chess.pgn

def print_all_prefixes(game):
    """Prints all prefixes of a chess game in PGN notation."""

    node = game
    while node:
        print(game.game().end().board().variation_san(node.mainline_moves()))
        print()  # Add a newline for readability between variations
        node = node.parent




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 18, 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 9, in print_all_prefixes print(game.game().end().board().variation_san(node.mainline_moves())) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.12/dist-packages/chess/__init__.py", line 3110, in variation_san raise IllegalMoveError(f"illegal move {move} in position {board.fen()}") chess.IllegalMoveError: illegal move g1f3 in position r4rk1/pp2Bpbp/1qp3p1/8/2BP2b1/Q1n2N2/P4PPP/3RK2R w K - 0 16

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

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import chess.pgn

def print_all_prefixes(game):
    """Prints the PGN notation for all prefixes of a chess game.

    Args:
        game: A chess.pgn.Game object representing the game.
    """

    node = game
    while node:
        print(game.game().end().board().variation_san(node))  # Use variation_san to get correct PGN
        print() # Add a newline for readability between prefixes
        node = node.parent

Extract Code

I extracted the following code from that output: 

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import chess.pgn

def print_all_prefixes(game):
    """Prints the PGN notation for all prefixes of a chess game.

    Args:
        game: A chess.pgn.Game object representing the game.
    """

    node = game
    while node:
        print(game.game().end().board().variation_san(node))  # Use variation_san to get correct PGN
        print() # Add a newline for readability between prefixes
        node = node.parent

Run Code Interpreter

Running the following program: 

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import chess.pgn

def print_all_prefixes(game):
    """Prints the PGN notation for all prefixes of a chess game.

    Args:
        game: A chess.pgn.Game object representing the game.
    """

    node = game
    while node:
        print(game.game().end().board().variation_san(node))  # Use variation_san to get correct PGN
        print() # Add a newline for readability between prefixes
        node = node.parent



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 21, 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 13, in print_all_prefixes print(game.game().end().board().variation_san(node)) # Use variation_san to get correct PGN ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.12/dist-packages/chess/__init__.py", line 3109, in variation_san if not board.is_legal(move): ^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.12/dist-packages/chess/__init__.py", line 1999, in is_legal return not self.is_variant_end() and self.is_pseudo_legal(move) and not self.is_into_check(move) ^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.12/dist-packages/chess/__init__.py", line 1955, in is_pseudo_legal if move.drop: ^^^^^^^^^ AttributeError: 'ChildNode' object has no attribute 'drop'

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

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import chess.pgn

def print_all_prefixes(game):
    """Prints the PGN notation for all prefixes of a given chess game.

    Args:
        game: A chess.pgn.Game object representing the game.
    """

    node = game
    while node:
        print(game.game().pgn())  # Use game.game() to get the root node for correct PGN
        node = node.variations[0] if node.variations else None
        if node:
             game = node # Move to the next move in the game

Extract Code

I extracted the following code from that output: 

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import chess.pgn

def print_all_prefixes(game):
    """Prints the PGN notation for all prefixes of a given chess game.

    Args:
        game: A chess.pgn.Game object representing the game.
    """

    node = game
    while node:
        print(game.game().pgn())  # Use game.game() to get the root node for correct PGN
        node = node.variations[0] if node.variations else None
        if node:
             game = node # Move to the next move in the game

Run Code Interpreter

Running the following program: 

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import chess.pgn

def print_all_prefixes(game):
    """Prints the PGN notation for all prefixes of a given chess game.

    Args:
        game: A chess.pgn.Game object representing the game.
    """

    node = game
    while node:
        print(game.game().pgn())  # Use game.game() to get the root node for correct PGN
        node = node.variations[0] if node.variations else None
        if node:
             game = node # Move to the next move in the game





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 24, 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 13, in print_all_prefixes print(game.game().pgn()) # Use game.game() to get the root node for correct PGN ^^^^^^^^^^^^^^^ AttributeError: 'Game' object has no attribute 'pgn'

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

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import chess.pgn

def print_all_prefixes(game):
    """Prints the PGN notation for all prefixes of a given chess game."""

    while game:
        print(game)
        game = game.next()  # Move to the next node (shorter prefix)

Extract Code

I extracted the following code from that output: 

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import chess.pgn

def print_all_prefixes(game):
    """Prints the PGN notation for all prefixes of a given chess game."""

    while game:
        print(game)
        game = game.next()  # Move to the next node (shorter prefix)

Run Code Interpreter

Running the following program: 

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import chess.pgn

def print_all_prefixes(game):
    """Prints the PGN notation for all prefixes of a given chess game."""

    while game:
        print(game)
        game = game.next()  # Move to the next node (shorter prefix)




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: [Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "?"] [Black "?"] [Result "*"] 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... 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 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 2... 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 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 3... 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 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 4... 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 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 5... 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 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 6... 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 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 7... 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 8. e4 Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 8... Nbd7 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 9. Rd1 Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 9... Nb6 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 10. Qc5 Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 10... Bg4 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 11. Bg5 Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 11... Na4 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 12. Qa3 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 12... Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 13. bxc3 Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 13... Nxe4 14. Bxe7 Qb6 15. Bc4 Nxc3 14. Bxe7 Qb6 15. Bc4 Nxc3 14... Qb6 15. Bc4 Nxc3 15. Bc4 Nxc3 15... Nxc3

PyFunc

Resulting in output: False