ECO B50
10 named openings and variations are classified as B50. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- Sicilian Defense: Delayed Alapin Variation, Basman-Palatnik Double GambitB501. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nc6 5. d4 cxd4 6. cxd4 Nxe4 7. d5 Qa5+ 8. Nc3 Nxc3 9. bxc3
- Sicilian Defense: Delayed Alapin Variation, Basman-Palatnik GambitB501. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nc6 5. d4 cxd4 6. cxd4 Nxe4
- Sicilian Defense: Delayed Alapin Variation, with d6B501. e4 c5 2. Nf3 d6 3. c3
- Sicilian Defense: Kopec SystemB501. e4 c5 2. Nf3 d6 3. Bd3
- Sicilian Defense: Kotov GambitB501. e4 c5 2. Nf3 d6 3. g3 b5
- Sicilian Defense: Modern VariationsB501. e4 c5 2. Nf3 d6
- Sicilian Defense: Modern Variations, Anti-Qxd4 Move OrderB501. e4 c5 2. Nf3 d6 3. d4 Nf6
- Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order AcceptedB501. e4 c5 2. Nf3 d6 3. d4 Nf6 4. dxc5 Nxe4
- Sicilian Defense: Modern Variations, TartakowerB501. e4 c5 2. Nf3 d6 3. d4 cxd4 4. c3
- Sicilian Defense: Wing Gambit, Deferred VariationB501. e4 c5 2. Nf3 d6 3. b4