bool operator==(const Move& m) const { return pv[0] == m; }
void insert_pv_in_tt(Position& pos);
bool extract_ponder_from_tt(Position& pos);
bool operator==(const Move& m) const { return pv[0] == m; }
void insert_pv_in_tt(Position& pos);
bool extract_ponder_from_tt(Position& pos);