Chess puzzle (Equality)
Moves: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nd5 Bc5 6. Bg5 h6 7. Bxf6 gxf6 8.
Qd2 d6 9. b4 Bb6 10. a4 a5 11. b5 Nb4 12. Nxb4 *
Position (FEN): r1bqk2r/1pp2p2/1b1p1p1p/pP6/PN1pP3/5N2/2PQ1PPP/R3KB1R b KQkq - 0 12
Black to move.
Themes:  Middlegame  
Puzzle rating: 1425
Best move: axb4