Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Open
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 d6 5. Nc3 a6 6. Be2 Nf6 7. O-O g6 8. Bg5
Bg7 9. Bf3 Bd7 10. Bxf6 Bxf6 11. Re1 O-O 12. Nxc6 Bxc6 13. Nd5 Bg7 14. c3 Rb8
15. Nb4 Bb5 16. a4 Bc4 17. Be2 Be6 18. Bxa6 *
Position (FEN): 1r1q1rk1/1p2ppbp/B2pb1p1/8/PN2P3/2P5/1P3PPP/R2QR1K1 b - - 0 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 1248
Best move: bxa6