void pv_instability(int curChanges, int prevChanges);
int available_time() const { return optimumSearchTime + unstablePVExtraTime; }
int maximum_time() const { return maximumSearchTime; }
void pv_instability(int curChanges, int prevChanges);
int available_time() const { return optimumSearchTime + unstablePVExtraTime; }
int maximum_time() const { return maximumSearchTime; }