Chess puzzle (Equality)
Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. g3 b5 7. Bf4 e5 8. Ndxb5
axb5 9. Nxb5 Qc5 10. Be3 Qc6 11. Qd3 Nf6 12. O-O-O Ba6 13. Nd6+ Bxd6 14. Qxd6
Qxe4 15. Bxa6 *
Position (FEN): rn2k2r/3p1ppp/B2Q1n2/4p3/4q3/4B1P1/PPP2P1P/2KR3R b kq - 0 15
Black to move.
Themes:  Middlegame  
Puzzle rating: 1924
Best move: Nxa6