def save_used_hash(self, gs: GameState, uct_nodes: List[UctNode], index):
self.node_hash[index].flag = True
self.used += 1
current_node = uct_nodes[index]
child_index = current_node.child_index
child_move = current_node.child_move
child_num = current_node.child_num
for i in range(child_num):
if child_index[i] != NOT_EXPANDED and self.node_hash[
child_index[i]].flag == False:
gs.move_with_id(child_move[i])
self.save_used_hash(gs, uct_nodes, child_index[i])
gs.pop()
