ECO B25
3 named openings and variations are classified as B25. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- Sicilian Defense: Closed, Botvinnik Defense, Edge VariationB251. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e5 7. Nh3 Nge7
- Sicilian Defense: Closed, Botvinnik Defense, with Nge2B251. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Nge2 e5
- Sicilian Defense: Closed, Botvinnik Defense, with f4B251. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e5