Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Lasker-Pelikan_Variation
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8.
Bxf6 gxf6 9. Na3 b5 10. Nd5 Bg7 11. c3 f5 12. Bxb5 *
Position (FEN): r1bqk2r/5pbp/p1np4/1B1Npp2/4P3/N1P5/PP3PPP/R2QK2R b KQkq - 0 12
Black to move.
Themes:  Middlegame  
Puzzle rating: 1260
Best move: axb5