def delete_old_hash(self, gs: GameState, uct_nodes: List[UctNode]):
"""古いハッシュを削除"""
# 現在の局面をルートとする局面以外を削除する
root = self.find_same_hash_index(gs.board_hash(), gs.turn, gs.n_turns)
self.used = 0
for i in range(UCT_HASH_SIZE):
self.node_hash[i].flag = False
if root != UCT_HASH_SIZE:
self.save_used_hash(gs, uct_nodes, root)
self.enough_size = True
