13-25 E Diemer vs NN, 1949  (D00) Queen's Pawn Game, 13 moves, 1-0 13-26 Koltanowski vs NN, 1953  (C41) Philidor Defense, 13 moves, 1-0 13-27 V Litvinov vs Veresov, 1958  (A85) Dutch, with c4 & Nc3, 13 moves, 0-1 3 games