Caro-Kann Defense 3,441 Italian Game 1,537 Queen's Pawn Opening 1,108 Sicilian Defense 993 Other & Irregular Openings 726 French Defense 417 King's Pawn Opening 393 Philidor Defense 311 Scandinavian Defense 300 Modern Defense 291 Réti Opening 269 Petrov's Defense 263 Slav Defense 253 Pirc Defense 252 Queen's Gambit 204 Nimzowitsch-Larsen Attack 195 English Opening 169 Indian Game 162 Nimzowitsch Defense 125 Bishop's Opening 115 Van't Kruijs Opening 90 Alekhine's Defense 84 Four Knights Game 80 Scotch Game 76 King's Indian Attack 75 Ruy López (Spanish) 73 Owen's Defense 65 King's Indian Defense 62 King's Fianchetto Opening 58 Vienna Game 57 London System 38 Three Knights Opening 38 Bird's Opening 31 Old Benoni Defense 26 Alapin Sicilian Defense... 25 Mieses Opening 22 Nimzo-Indian Defense 22 Polish Opening 21 Benoni Defense 18 Center Game 18 Trompowsky Attack 17 Dutch Defense 15 Colle System 12 Queens Indian Defense 12 Torre Attack 12 Grünfeld Defense 11 King's Gambit 11 Catalan Opening 10 Old Indian Defense 10 Van Geet Opening 10 Anderssen Opening 8 Clemenz Opening 8 Closed Sicilian Defense... 8 Grob Opening 8 Tarrasch Defense 7 Saragossa Opening 6 Ponziani Opening 5 Richter-Veresov Attack 5 Semi-Slav Defense 5 Lion Defense 4 Neo Grunfeld Defense 4 English Defense 3 Englund Gambit 3 Bogo Indian Defense 2 Magnus Queens Gambit... 1 Magnus Sicilian... 1