B00–C44WhiteKing's Pawn Game1. e4 38 named linesWayward Queen AttackGunderam GambitDamiano DefenseLeonardis Variation
B20–B99BlackSicilian Defense1. e4 c5 370 named linesModern VariationsOld SicilianNajdorf VariationFrench Variation
B10–B19BlackCaro-Kann Defense1. e4 c6 103 named linesMain LineExchange VariationPanov AttackClassical Variation
B02–B05BlackAlekhine Defense1. e4 Nf6 56 named linesNormal VariationModern VariationFour Pawns AttackExchange Variation
B01BlackScandinavian Defense1. e4 d5 45 named linesModern VariationMieses-Kotroc VariationModern VariationMain Line
B07–B09BlackPirc Defense1. e4 d6 28 named linesClassical VariationClassical VariationAustrian AttackAustrian Attack
A04–B27BlackModern Defense1. e4 g6 39 named linesStandard LineAverbakh SystemStandard DefenseModern Pterodactyl
B00BlackNimzowitsch Defense1. e4 Nc6 43 named linesDeclined VariationScandinavian VariationKennedy VariationWilliams Variation
B00BlackSt. George Defense1. e4 a6 4 named linesZilbermints GambitPolish VariationSan Jorge Variation
B00BlackOwen Defense1. e4 b6 8 named linesMatovinsky GambitGuatemala DefenseNaselwaus GambitSmith Gambit
A41–C00WhiteRat Defense1. e4 d6 2. f4 11 named linesEnglish RatPetruccioli AttackSpike AttackAntal Defense