Caro-Kann Defense 3,319 Italian Game 1,498 Queen's Pawn Opening 1,032 Sicilian Defense 655 King's Pawn Opening 378 Other & Irregular Openings 343 French Defense 319 Philidor Defense 303 Scandinavian Defense 273 Petrov's Defense 260 Slav Defense 233 Pirc Defense 221 Réti Opening 160 Queen's Gambit 138 Nimzowitsch Defense 118 Modern Defense 116 Bishop's Opening 96 Van't Kruijs Opening 87 Scotch Game 72 Indian Game 69 English Opening 68 Alekhine's Defense 64 Nimzowitsch-Larsen Attack 63 Four Knights Game 59 Owen's Defense 52 King's Fianchetto Opening 50 King's Indian Attack 50 Ruy López (Spanish) 47 Three Knights Opening 38 Vienna Game 34 London System 30 Bird's Opening 24 Mieses Opening 21 Polish Opening 18 Center Game 17 Alapin Sicilian Defense... 11 King's Gambit 9 Van Geet Opening 9 Clemenz Opening 8 Old Benoni Defense 8 Old Indian Defense 8 Colle System 7 Grob Opening 7 King's Indian Defense 7 Anderssen Opening 6 Saragossa Opening 6 Ponziani Opening 5 Tarrasch Defense 5 Trompowsky Attack 4 Richter-Veresov Attack 3 Semi-Slav Defense 3 Englund Gambit 2 Nimzo-Indian Defense 2 English Defense 1 Grünfeld Defense 1 Lion Defense 1