int board_undo()

in pachi_py/pachi/board.c [1395:1409]

• 14 lines of code
• 4 McCabe index (conditional complexity)

int board_undo(struct board *board)
{
	if (!is_pass(board->last_move.coord))
		return -1;
	if (board->rules == RULES_SIMING) {
		/* Return pass stone to the passing player. */
		board->captures[stone_other(board->last_move.color)]--;
	}
	board->last_move = board->last_move2;
	board->last_move2 = board->last_move3;
	board->last_move3 = board->last_move4;
	if (board->last_ko_age == board->moves)
		board->ko = board->last_ko;
	return 0;
}