:
B20: Sicilian Defence, Unusual White second moves: 1.e4 c5
B21: .......... 2.f4 Attack: 1.e4 c5 2.f4
B21: .......... Smith-Morra Gambit: 1.e4 c5 2.d4 cxd4 3.c3
B22: .......... Alapin Variation: 1.e4 c5 2.c3
B23: .......... Closed Sicilians without g3: 1.e4 c5 2.Nc3
B23: .......... Grand Prix Attack: 1.e4 c5 2.Nc3 Nc6 3.f4
B24: Closed Sicilian, 3.g3 sidelines: 1.e4 c5 2.Nc3 Nc6 3.g3
B25: Closed Sicilian, 3.g3 without early Be3: 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7
B26: Closed Sicilian, 3.g3 with early Be3: 1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Be3
B27: .......... 2.Nf3 early deviations: 1.e4 c5 2.Nf3
B28: .......... O'Kelly Variation: 1.e4 c5 2.Nf3 a6
B29: .......... Nimzowitsch Variation: 1.e4 c5 2.Nf3 Nf6
B30: .......... Rossolimo Variation without ...g6: 1.e4 c5 2.Nf3 Nc6 3.Bb5
B31: .......... Rossolimo Variation with 3...g6: 1.e4 c5 2.Nf3 Nc6 3.Bb5 g6
B32: .......... Löwenthal and Kalashnikov Variations: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e5
B33: .......... Pelikan and Sveshnikov Variations: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6
5.Nc3 e5
B34: .......... Accelerated Dragon sidelines: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6
B35: .......... Accelerated Dragon main line: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3
Bg7 6.Be3 Nf6 7.Bc4
B36: .......... Maroczy Bind, Gurgenidze System: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6
5.c4 Nxd4 6.Qxd4
B37: .......... Maroczy Bind with 5...Bg7 sidelines: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6
5.c4 Bg7
B38: .......... Maroczy Bind with 5...Bg7 and 7...O-O: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4
g6 5.c4 Bg7 6.Be3 Nf6 7.Nc3 O-O
B39: .......... Maroczy Bind with 5...Bg7 main line: 1.e4 c5 2.Nc3 Nc6 3.d4 cxd4 4.Nxd4 g6
5.c4 Bg7 6.Be3 Nf6 7.Nc3 Ng4 8.Qxg4 Nxd4
B40: .......... 2...e6 miscellaneous: 1.e4 c5 2.Nf3 e6
B41 - 43: ..........
Kann Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6
B44 - 49: ..........
Taimanov Variation: 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6
B50: .......... 2...d6 miscellaneous: 1.e4 c5 2.Nf3 d6
B51: .......... Moscow Variation early deviations: 1.e4 c5 2.Nf3 d6 3.Bb5
B52: .......... Moscow Variation with 3...Bd7: 1.e4 c5 2.Nf3 d6 3.Bb5 Bd7
B53: .......... Chekhover Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4
B54: .......... Unusual open lines: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4
B55: .......... Open lines with 5.f3: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3
B56: .......... Unusual open lines: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3
B57: Classical Sicilian, Sozin Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4
B58: Classical Sicilian, Boleslavsky Variation with 7.Nf3: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6
5.Nc3 d6 6.Be2 e5 7.Nf3
B59: Classical Sicilian, Boleslavsky Variation with 7.Nb3: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6
5.Nc3 d6 6.Be2 e5 7.Nb3
B60 - 69: ..........
Richter-Rauzer Variation: 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6
B70 - 79: ..........
Dragon Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6
B80 - 89: ..........
Scheveningen Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6
B80 - 89: ..........
Najdorf Variation: 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6
