Chess puzzle (Advantage)
Opening: Zukertort_Opening, Zukertort_Opening_Tennison_Gambit
Moves: 1. e4 d5 2. Nf3 dxe4 3. Ne5 Nc6 4. Nxc6 bxc6 5. Nc3 Bf5 6. Bb5 Nf6 7. Bxc6+ Nd7
8. Bxa8 Qxa8 9. O-O Qc6 10. d3 Nc5 11. Bg5 exd3 12. cxd3 Nxd3 13. Qxd3 *
Position (FEN): 4kb1r/p1p1pppp/2q5/5bB1/8/2NQ4/PP3PPP/R4RK1 b k - 0 13
Black to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 807
Best move: Bxd3