Chess puzzle (Advantage)
Opening: French_Defense, French_Defense_Steinitz_Attack
Moves: 1. e4 e6 2. e5 d5 3. exd6 Bxd6 4. Bb5+ Bd7 5. Nc3 Bxb5 6. Nxb5 Bc5 7. d4 Bb6 8.
Qg4 Qf6 9. Bf4 a6 10. Nxc7+ Bxc7 11. Bxc7 Nh6 12. Qe4 Nc6 13. Nf3 O-O 14. O-O-O
Rac8 15. Ba5 *
Position (FEN): 2r2rk1/1p3ppp/p1n1pq1n/B7/3PQ3/5N2/PPP2PPP/2KR3R b - - 8 15
Black to move.
Themes: Hanging Piece Middlegame  
Puzzle rating: 957
Best move: Nxa5