Chess puzzle (Advantage)
Opening: Bishops_Opening, Bishops_Opening_Vienna_Hybrid
Moves: 1. e4 e5 2. Bc4 Nc6 3. Nc3 Nf6 4. d3 Bb4 5. Bg5 h6 6. Bh4 g5 7. Bg3 d6 8. h3
Be6 9. Bb3 Qd7 10. Ne2 O-O-O 11. a3 Bxb3 *
Position (FEN): 2kr3r/pppq1p2/2np1n1p/4p1p1/1b2P3/PbNP2BP/1PP1NPP1/R2QK2R w KQ - 0 12
White to move.
Themes:  Middlegame  
Puzzle rating: 1759
Best move: axb4