[feature request] add `board.san_move_stack` similar to `board.move_stack` to get san format moves about python-chess HOT 1 CLOSED

Maintaining an additional stack like that has significant runtime overhead for everyone who doesn't need it.

But a custom wrapper could always provide both in sync. Something along the lines of:

import chess

class WithSanStack:
    def __init__(self, board):
        self.board = board

        replay = board.root()
        self.san_stack = [replay.san_and_push(m) for m in board.move_stack]

    def push(self, move):
        self.san_stack.append(self.board.san_and_push(move))

    def pop(self):
        self.san_stack.pop()
        return self.board.pop()

The implementation of __init__ also demonstrates how to create such a stack for an existing board. Depending on the use case that could also just be done on-demand, without a wrapper class.

from python-chess.