Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Nyezhmetdinov-Rossolimo_Attack
Moves: 1. e4 c5 2. Nf3 Nc6 3. Bb5 Qc7 4. c3 e6 5. O-O Be7 6. Re1 d6 7. d4 cxd4 8. cxd4
a6 9. Ba4 b5 10. Bb3 Na5 11. Nc3 Nxb3 12. Qxb3 Bb7 13. Bf4 Nf6 14. Rac1 Qd8 15.
Nxb5 *
Position (FEN): r2qk2r/1b2bppp/p2ppn2/1N6/3PPB2/1Q3N2/PP3PPP/2R1R1K1 b kq - 0 15
Black to move.
Themes:  Middlegame  
Puzzle rating: 1459
Best move: axb5