import chess.pgn
import io

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

    Args:
        game (chess.pgn.Game): The PGN game to process.
    """
    # Initialize a new game with the same headers as the original game
    prefix_game = chess.pgn.Game()
    for header, value in game.headers.items():
        prefix_game.headers[header] = value

    current_node = prefix_game

    # Iterate through each move in the mainline of the original game
    for node in game.mainline():
        # Add the move to the prefix game
        current_node = current_node.add_variation(node.move)
        
        # Create a StringIO object to hold the PGN output
        pgn_io = io.StringIO()
        
        # Dump the current prefix game to the StringIO object
        chess.pgn.dump(prefix_game, pgn_io)
        
        # Retrieve the PGN string from StringIO and print it
        pgn_string = pgn_io.getvalue()
        print(pgn_string)

import chess.pgn
import io

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

    Args:
        game (chess.pgn.Game): The PGN game to process.
    """
    # Initialize a new game with the same headers as the original game
    prefix_game = chess.pgn.Game()
    for header, value in game.headers.items():
        prefix_game.headers[header] = value

    current_node = prefix_game

    # Iterate through each move in the mainline of the original game
    for node in game.mainline():
        # Add the move to the prefix game
        current_node = current_node.add_variation(node.move)
        
        # Create a StringIO object to hold the PGN output
        pgn_io = io.StringIO()
        
        # Dump the current prefix game to the StringIO object
        chess.pgn.dump(prefix_game, pgn_io)
        
        # Retrieve the PGN string from StringIO and print it
        pgn_string = pgn_io.getvalue()
        print(pgn_string)

import chess.pgn
import io

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

    Args:
        game (chess.pgn.Game): The PGN game to process.
    """
    # Initialize a new game with the same headers as the original game
    prefix_game = chess.pgn.Game()
    for header, value in game.headers.items():
        prefix_game.headers[header] = value

    current_node = prefix_game

    # Iterate through each move in the mainline of the original game
    for node in game.mainline():
        # Add the move to the prefix game
        current_node = current_node.add_variation(node.move)
        
        # Create a StringIO object to hold the PGN output
        pgn_io = io.StringIO()
        
        # Dump the current prefix game to the StringIO object
        chess.pgn.dump(prefix_game, pgn_io)
        
        # Retrieve the PGN string from StringIO and print it
        pgn_string = pgn_io.getvalue()
        print(pgn_string)



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')))

import chess.pgn
import io

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

    Parameters:
    game (chess.pgn.Game): The chess game to process.
    """
    mainline = game.mainline()
    headers = game.headers

    # Initialize an empty game for constructing prefixes
    prefix_game = chess.pgn.Game()

    # Copy headers from the original game
    for key, value in headers.items():
        prefix_game.headers[key] = value

    current_node = prefix_game

    # Iterate through each move in the mainline
    for node in mainline:
        move = node.move
        current_node = current_node.add_variation(move)

        # Create a PGN exporter
        exporter = chess.pgn.StringExporter(headers=True, variations=False, comments=False)
        pgn_string = prefix_game.accept(exporter)

        # Print the PGN string for the current prefix
        print(pgn_string)

import chess.pgn
import io

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

    Parameters:
    game (chess.pgn.Game): The chess game to process.
    """
    mainline = game.mainline()
    headers = game.headers

    # Initialize an empty game for constructing prefixes
    prefix_game = chess.pgn.Game()

    # Copy headers from the original game
    for key, value in headers.items():
        prefix_game.headers[key] = value

    current_node = prefix_game

    # Iterate through each move in the mainline
    for node in mainline:
        move = node.move
        current_node = current_node.add_variation(move)

        # Create a PGN exporter
        exporter = chess.pgn.StringExporter(headers=True, variations=False, comments=False)
        pgn_string = prefix_game.accept(exporter)

        # Print the PGN string for the current prefix
        print(pgn_string)

import chess.pgn
import io

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

    Parameters:
    game (chess.pgn.Game): The chess game to process.
    """
    mainline = game.mainline()
    headers = game.headers

    # Initialize an empty game for constructing prefixes
    prefix_game = chess.pgn.Game()

    # Copy headers from the original game
    for key, value in headers.items():
        prefix_game.headers[key] = value

    current_node = prefix_game

    # Iterate through each move in the mainline
    for node in mainline:
        move = node.move
        current_node = current_node.add_variation(move)

        # Create a PGN exporter
        exporter = chess.pgn.StringExporter(headers=True, variations=False, comments=False)
        pgn_string = prefix_game.accept(exporter)

        # Print the PGN string for the current prefix
        print(pgn_string)



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')))