1.e4 e5 2.Nf3 Nc6 3,Nc3 Nf6 4.d4 Bb4!? Nimzowitsch vs P S Leonhardt, 1907   (C47) Four Knights, 21 moves, 1-0 M Czerniak vs S Burstein, 1958 (C47) Four Knights, 41 moves, 1-0 4.d4 exd4 5.Nxd4 Bb4 6.Nxc6 dxc6?! M Sebag vs N Franc, 2001 (C45) Scotch Game, 39 moves, 1-0 V Vepkhvishvili vs I Khelaia, 1979 (C47) Four Knights, 18 moves, 1-0 S Grover vs Sai Nirupama Kotepalli, 2017  (C45) Scotch Game, 20 moves, 0-1 4.d4 exd4 5.Nxd4 Bb4 6.Nxc6 bxc6 - main line with Bg5 Bird vs Maroczy, 1899  (C45) Scotch Game, 64 moves, 1/2-1/2 O Loewenborg vs B Rask, 1915 (C47) Four Knights, 20 moves, 1-0 E Berg vs I Sokolov, 2001  (C45) Scotch Game, 25 moves, 1-0 A Kaufman vs Evans, 1955  (C47) Four Knights, 23 moves, 1/2-1/2 J Musialkiewicz vs K Chojnacki, 2012  (C45) Scotch Game, 39 moves, 1-0 White plays an early h3 H Wang vs Anand, 2013  (C45) Scotch Game, 49 moves, 1-0 Kramnik vs Aronian, 2012  (C47) Four Knights, 40 moves, 1/2-1/2 Kramnik vs Aronian, 2012  (C47) Four Knights, 42 moves, 1-0 Good play by Black M Sebag vs Kosteniuk, 2019  (C47) Four Knights, 47 moves, 0-1 Paulsen's variation Tarrasch vs E Schallopp, 1887  (C47) Four Knights, 47 moves, 0-1 Paulsen vs Chigorin, 1882  (C45) Scotch Game, 30 moves, 1-0 Paulsen vs M Weiss, 1882  (C47) Four Knights, 35 moves, 1-0 17 games