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.
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.
Here's a solution for the `print_all_prefixes(game)` function in python-chess:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | def print_all_prefixes(game): board = game.board() moves = list(game.mainline_moves()) for i in range(len(moves) + 1): # Create a new PGN exporter exporter = chess.pgn.StringExporter(headers=True, variations=False, comments=False) # Make a copy of the board prefix_board = board.copy() # Play moves up to the current prefix length game_prefix = chess.pgn.Game() game_prefix.setup(prefix_board) for j in range(i): game_prefix.add_variation(moves[j]) # Export the game prefix to PGN game_prefix.accept(exporter) print(exporter.getvalue()) |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | def print_all_prefixes(game): board = game.board() moves = list(game.mainline_moves()) for i in range(len(moves) + 1): # Create a new PGN exporter exporter = chess.pgn.StringExporter(headers=True, variations=False, comments=False) # Make a copy of the board prefix_board = board.copy() # Play moves up to the current prefix length game_prefix = chess.pgn.Game() game_prefix.setup(prefix_board) for j in range(i): game_prefix.add_variation(moves[j]) # Export the game prefix to PGN game_prefix.accept(exporter) print(exporter.getvalue()) |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | def print_all_prefixes(game): board = game.board() moves = list(game.mainline_moves()) for i in range(len(moves) + 1): # Create a new PGN exporter exporter = chess.pgn.StringExporter(headers=True, variations=False, comments=False) # Make a copy of the board prefix_board = board.copy() # Play moves up to the current prefix length game_prefix = chess.pgn.Game() game_prefix.setup(prefix_board) for j in range(i): game_prefix.add_variation(moves[j]) # Export the game prefix to PGN game_prefix.accept(exporter) print(exporter.getvalue()) 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'))) |
Traceback (most recent call last):
File "/usr/src/app/main.py", line 28, 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 22, in print_all_prefixes
print(exporter.getvalue())
^^^^^^^^^^^^^^^^^
AttributeError: 'StringExporter' object has no attribute 'getvalue'
Resulting in output: False
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.
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.
Here's a Python function to print the PGN notation for all prefixes of a chess game:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | def print_all_prefixes(game): # Iterate through all possible prefix lengths for num_moves in range(len(list(game.mainline_moves())) + 1): # Create a new game with only the first 'num_moves' moves prefix_game = game.copy() prefix_moves = list(prefix_game.mainline_moves())[:num_moves] # Create a new game board and apply these moves board = prefix_game.board() for move in prefix_moves: board.push(move) # Write the partial game to a PGN string and print exporter = chess.pgn.StringExporter(headers=True, variations=False, comments=False) prefix_pgn = prefix_game.accept(exporter) print(f"Prefix with {num_moves} moves:\n{prefix_pgn}\n") |
I extracted the following code from that output:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | def print_all_prefixes(game): # Iterate through all possible prefix lengths for num_moves in range(len(list(game.mainline_moves())) + 1): # Create a new game with only the first 'num_moves' moves prefix_game = game.copy() prefix_moves = list(prefix_game.mainline_moves())[:num_moves] # Create a new game board and apply these moves board = prefix_game.board() for move in prefix_moves: board.push(move) # Write the partial game to a PGN string and print exporter = chess.pgn.StringExporter(headers=True, variations=False, comments=False) prefix_pgn = prefix_game.accept(exporter) print(f"Prefix with {num_moves} moves:\n{prefix_pgn}\n") |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | def print_all_prefixes(game): # Iterate through all possible prefix lengths for num_moves in range(len(list(game.mainline_moves())) + 1): # Create a new game with only the first 'num_moves' moves prefix_game = game.copy() prefix_moves = list(prefix_game.mainline_moves())[:num_moves] # Create a new game board and apply these moves board = prefix_game.board() for move in prefix_moves: board.push(move) # Write the partial game to a PGN string and print exporter = chess.pgn.StringExporter(headers=True, variations=False, comments=False) prefix_pgn = prefix_game.accept(exporter) print(f"Prefix with {num_moves} moves:\n{prefix_pgn}\n") 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'))) |
Traceback (most recent call last):
File "/usr/src/app/main.py", line 23, 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
prefix_game = game.copy()
^^^^^^^^^
AttributeError: 'Game' object has no attribute 'copy'
Resulting in output: False
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.
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.
Here's a solution for the print_all_prefixes function:
1 2 3 4 5 | def print_all_prefixes(game): node = game while node is not None: print(node.root().mainline_moves().pgnstring()) node = node.variation(0) if len(node.variations) > 0 else None |
I extracted the following code from that output:
1 2 3 4 5 | def print_all_prefixes(game): node = game while node is not None: print(node.root().mainline_moves().pgnstring()) node = node.variation(0) if len(node.variations) > 0 else None |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 | def print_all_prefixes(game): node = game while node is not None: print(node.root().mainline_moves().pgnstring()) node = node.variation(0) if len(node.variations) > 0 else None 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'))) |
Traceback (most recent call last):
File "/usr/src/app/main.py", line 12, 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 5, in print_all_prefixes
print(node.root().mainline_moves().pgnstring())
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'Mainline' object has no attribute 'pgnstring'
Resulting in output: False
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.
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.
Here's a solution for printing all prefixes of a chess game in PGN notation:
1 2 3 4 5 6 7 | def print_all_prefixes(game): board = game.board() node = game while node is not None: print(node.root().accept(chess.pgn.StringExporter(headers=True, variations=False))) node = node.variation(0) if len(node.variations) > 0 else None |
I extracted the following code from that output:
1 2 3 4 5 6 7 | def print_all_prefixes(game): board = game.board() node = game while node is not None: print(node.root().accept(chess.pgn.StringExporter(headers=True, variations=False))) node = node.variation(0) if len(node.variations) > 0 else None |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 12 13 | def print_all_prefixes(game): board = game.board() node = game while node is not None: print(node.root().accept(chess.pgn.StringExporter(headers=True, variations=False))) node = node.variation(0) if len(node.variations) > 0 else None 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'))) |
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
[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 *
Resulting in output: True
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.
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.
Here's a function to print PGN notation for all prefixes of a chess game:
1 2 3 4 5 | def print_all_prefixes(game): node = game while node is not None: print(node.root().variation(0).mainline_moves().board().create_chess_variant().pgn()) node = node.variation(0) if node.variations else None |
I extracted the following code from that output:
1 2 3 4 5 | def print_all_prefixes(game): node = game while node is not None: print(node.root().variation(0).mainline_moves().board().create_chess_variant().pgn()) node = node.variation(0) if node.variations else None |
Running the following program:
1 2 3 4 5 6 7 8 9 10 11 | def print_all_prefixes(game): node = game while node is not None: print(node.root().variation(0).mainline_moves().board().create_chess_variant().pgn()) node = node.variation(0) if node.variations else None 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'))) |
Traceback (most recent call last):
File "/usr/src/app/main.py", line 12, 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 5, in print_all_prefixes
print(node.root().variation(0).mainline_moves().board().create_chess_variant().pgn())
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'Mainline' object has no attribute 'board'
Resulting in output: False