Two Knights Defense. Polerio Defense Bishop Check line Gunsberg vs Chigorin, 1890  (C58) Two Knights, 44 moves, 0-1 Two Knights Defense. Polerio Defense Bishop Check line Bird vs E Schallopp, 1890 (C58) Two Knights, 48 moves, 0-1 Two Knights Defense. Polerio Defense Bishop Check line Bird vs Lasker, 1892  (C58) Two Knights, 43 moves, 0-1 Two Knights Defense. Polerio Defense Bishop Check line V Castaldi vs Keres, 1937  (C58) Two Knights, 19 moves, 0-1 Two Knights Defense. Polerio Defense Bishop Check line R Doros vs A Beliavsky, 2011  (C58) Two Knights, 34 moves, 0-1 Two Knights Defense. Polerio Defense Bishop Check line Short vs Kasparov, 2011  (C58) Two Knights, 41 moves, 0-1 Two Knights Defense. Polerio Defense Bishop Check line S Zhigalko vs Karjakin, 2013 (C58) Two Knights, 64 moves, 0-1 Two Knights Defense. Polerio Defense Bishop Check line O Kurmann vs Naiditsch, 2014  (C58) Two Knights, 27 moves, 0-1 Two Knights Defense. Polerio Defense Bishop Check line V Sivuk vs A Beliavsky, 2015 (C58) Two Knights, 51 moves, 0-1 C Polterauer vs V Exler, 2013 (C58) Two Knights, 56 moves, 0-1 T Fakhrutdinov vs E Inarkiev, 2018 (C58) Two Knights, 44 moves, 0-1 11 games