├── B40 - 1. e4 c5 2. Nf3 e6 - Sicilian Defense: French Variation (44)
│   ├── B40 - 1. e4 c5 2. Nf3 e6 3. b3 - Sicilian Defense: French Variation, Westerinen Attack (4)
│   ├── B40 - 1. e4 c5 2. Nf3 e6 3. b4 - Sicilian Defense: Wing Gambit Deferred (0)
│   ├── B40 - 1. e4 c5 2. Nf3 e6 3. Be2 - Sicilian Defense: French Variation (3)
│   ├── B40 - 1. e4 c5 2. Nf3 e6 3. c3 - Sicilian Defense: Delayed Alapin Variation, with e6 (32)
│   │   └── B40 - 1. e4 c5 2. Nf3 e6 3. c3 Nf6 4.... - Sicilian Defense (32)
│   │       └── B40 - 1. e4 c5 2. Nf3 e6 3. c3 Nf6 4. e5 Nd5 5. d4 Nc6 - Sicilian Defense: Alapin Variation, Sherzer Variation (0)
│   ├── B40 - 1. e4 c5 2. Nf3 e6 3. c3 - Sicilian Defense: Delayed Alapin Variation, with e6 (1)
│   ├── B40 - 1. e4 c5 2. Nf3 e6 3. c4 - Sicilian Defense: Kramnik Variation (0)
│   ├── B40 - 1. e4 c5 2. Nf3 e6 3. d3 - Sicilian Defense: French Variation (8)
│   ├── B40 - 1. e4 c5 2. Nf3 e6 3. d4 a6 - Sicilian Defense: Drazic Variation (0)
│   ├── B40 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 - Sicilian Defense: French Variation, Open (4)
│   │   ├── B40 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. c3 - Sicilian Defense: Smith-Morra Gambit Deferred (0)
│   │   ├── B40 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Bc5 - Sicilian Defense: Paulsen-Basman Defense (0)
│   │   ├── B40 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 - Sicilian Defense: French Variation, Normal (4)
│   │   │   ├── B40 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 - Sicilian Defense: Pin Variation (3)
│   │   │   │   ├── B40 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. Bd3 e5 - Sicilian Defense: Pin Variation, Jaffe Variation (0)
│   │   │   │   └── B40 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. e5 - Sicilian Defense: Pin Variation, Koch Variation (3)
│   │   │   ├── B40 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Qd3 - Sicilian Defense: Four Knights Variation (0)
│   │   │   └── B40 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Qb6 - Sicilian Defense: Gaw-Paw Variation (0)
│   │   └── B40 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Qb6 - Sicilian Defense: Kveinis Variation (0)
│   ├── B40 - 1. e4 c5 2. Nf3 e6 3. d4 d5 - Sicilian Defense: Marshall Counterattack (0)
│   ├── B40 - 1. e4 c5 2. Nf3 e6 3. g3 - Sicilian Defense: French Variation (7)
│   ├── B40 - 1. e4 c5 2. Nf3 e6 3. h3 - Sicilian Defense: French Variation (1)
│   └── B40 - 1. e4 c5 2. Nf3 e6 3. Nc3 - Sicilian Defense: French Variation (1)
│       └── B40 - 1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. g3 b5 5. d4 cxd4 6. Nxd4 - Sicilian Defense: Kan Variation, Wing Attack, Fianchetto Variation (1)
├── B40 - 1. e4 c5 2. Nf3 e6 - Sicilian Defense: French Variation (33)
├── B41 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4.... - Sicilian Defense (4)
│   ├── B41 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 - Sicilian Defense: Kan Variation (3)
│   │   ├── B41 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. a3 - Sicilian Defense: Kan Variation (1)
│   │   └── B41 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 - Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation (2)
│   │       ├── B41 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 g6 - Sicilian Defense: Kan Variation, Maróczy Bind, Hedgehog Variation (1)
│   │       └── B41 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 - Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation (1)
│   │           └── B41 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 - Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation (1)
│   │               ├── B41 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Bb4 7. Bd3 Nc6 - Sicilian Defense: Kan Variation, Maróczy Bind, Bronstein Variation (0)
│   │               │   └── B41 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Bb4 7. Bd3 Nc6 8. Bc2 - Sicilian Defense: Kan Variation, Maróczy Bind, Bronstein Variation (0)
│   │               └── B41 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Qc7 - Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation (1)
│   └── B41 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Qxd4 - Sicilian Defense (1)
├── B42 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4.... - Sicilian Defense (2)
│   └── B42 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 - Sicilian Defense: Kan Variation, Modern Variation (2)
│       ├── B42 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Bc5 - Sicilian Defense: Kan Variation, Polugaevsky Variation (0)
│       ├── B42 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 g6 - Sicilian Defense: Kan Variation, Swiss Cheese Variation (0)
│       ├── B42 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 - Sicilian Defense: Kan Variation, Modern Variation (1)
│       │   └── B42 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O - Sicilian Defense: Kan Variation, Modern Variation (1)
│       │       └── B42 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O d6 7. c4 g6 - Sicilian Defense: Kan Variation, Gipslis Variation (0)
│       └── B42 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Qc7 - Sicilian Defense: Kan Variation (1)
├── B43 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4.... - Sicilian Defense (1)
│   └── B43 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 - Sicilian Defense: Kan Variation, Knight Variation (1)
│       └── B43 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 - Sicilian Defense: Kan Variation, Wing Attack (1)
│           └── B43 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 - Sicilian Defense: Kan Variation, Wing Attack (1)
│               ├── B43 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Bb7 - Sicilian Defense: Kan Variation, Wing Attack (1)
│               ├── B43 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Qb6 7. Be3 Bc5 8. Qg4 - Sicilian Defense: Kan Variation, Wing Attack, Christiansen's Dream (0)
│               └── B43 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Qb6 7. Nf3 - Sicilian Defense: Kan Variation, Wing Attack, Spraggett Attack (0)
├── B44 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 - Sicilian Defense: Taimanov Variation (1)
├── B45 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4.... - Sicilian Defense (19)
│   └── B45 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 - Sicilian Defense: Taimanov Variation (19)
│       ├── B45 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Bc5 - Sicilian Defense: Taimanov Variation (1)
│       └── B45 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 - Sicilian Defense: Four Knights Variation (18)
│           ├── B45 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 6. Ndb5 Bb4 7. Nd6+ - Sicilian Defense: Four Knights Variation, American Attack (0)
│           ├── B45 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 6. Qd3 - Sicilian Defense: Four Knights Variation (3)
│           ├── B45 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. a3 - Sicilian Defense: Four Knights Variation (7)
│           └── B45 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Nxc6 - Sicilian Defense: Four Knights Variation, Exchange Variation (8)
│               └── B45 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Nxc6 bxc6 7. e5 - Sicilian Defense: Four Knights Variation, Exchange Variation (8)
├── B46 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4.... - Sicilian Defense (1)
│   └── B46 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6 - Sicilian Defense: Taimanov Variation (1)
├── B47 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 - Sicilian Defense: Taimanov Variation, Bastrikov Variation (6)
│   ├── B47 - 1. e4 c5 2. Nc3 e6 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 Qc7 6. g3 - Sicilian Defense: Taimanov Variation, Bastrikov Variation (1)
│   ├── B47 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. g4 - Sicilian Defense: Taimanov Variation, Bastrikov Variation (1)
│   ├── B47 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Ncb5 - Sicilian Defense: Taimanov Variation (1)
│   ├── B47 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Ndb5 Qb8 7. Be3 a6 8. Bb6 - Sicilian Defense: Taimanov Variation, Bastrikov Variation, Ponomariov Gambit (0)
│   ├── B47 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Qd3 - Sicilian Defense: Taimanov Variation, Bastrikov Variation (1)
│   └── B47 - 1. e4 c5 2. Nf3 Nc6 3. Nc3 e6 4. d4 cxd4 5. Nxd4 Qc7 6. Be2 - Sicilian Defense: Taimanov Variation, Bastrikov Variation (2)
├── B48 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4.... - Sicilian Defense (5)
│   └── B48 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 - Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack (5)
└── B49 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4.... - Sicilian Defense (0)
    └── B49 - 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Be2 - Sicilian Defense: Taimanov Variation, Bastrikov Variation (0)