Chess puzzle (Equality)
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 e6 4. d5 exd5 5. exd5 Na5 6. Nc3 b6 7. Bb5 Bd6 8. O-O
Nf6 9. Re1+ Kf8 10. Bg5 a6 11. Ba4 b5 12. Nxb5 *
Position (FEN): r1bq1k1r/3p1ppp/p2b1n2/nNpP2B1/B7/5N2/PPP2PPP/R2QR1K1 b - - 0 12
Black to move.
Themes:  Opening  
Puzzle rating: 1780
Best move: axb5