Question: How else to change the state of the board?

[PedanticHacker]

I know 2 ways of changing the state of the board: one is push() and the other is set_fen(). How else is one able to change the state of the board?

[niklasf]

There are many ways. What are you trying to achieve?

[PedanticHacker]

I am trying to display a particular chessboard position when a move item (QTableWidgetItem) is clicked in the moves widget (QTableWidget).

Just like in lichess.org: when you click on a move item in the moves widget, the chessboard redraws itself to display the position that existed for when that clicked move was played. I wanna do the same.

Any alternatives to push() and set_fen()?

[niklasf]

Here is how to do the operations with python-chess datastructures:

import chess.pgn

# How to append moves to a game
game = chess.pgn.Game()
node = game
node = node.add_variation(chess.Move.from_uci("e2e4"))
node = node.add_variation(chess.Move.from_uci("e7e5"))
node = node.add_variation(chess.Move.from_uci("g1f3"))
node = node.add_variation(chess.Move.from_uci("b8c6"))

# How to get the board of the nth node
n = 3
node = game
for _ in range(n):
    node = node.variations[0]
print(node.board())

You can also easily use your own list of moves.

[PedanticHacker]

What about using the from_board() class attribute instead? So like chess.pgn.Game.from_board(board)?

[PedanticHacker]

Why are you doing that node = game thing? Is this really necessary?