pos.set(fens[i], Options["UCI_Chess960"], &states->back(), Threads.main());
cerr << "\nPosition: " << i + 1 << '/' << fens.size() << endl;
pos.set(fens[i], Options["UCI_Chess960"], &states->back(), Threads.main());
cerr << "\nPosition: " << i + 1 << '/' << fens.size() << endl;