Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Albin_Countergambit
Moves: 1. d4 d5 2. c4 e5 3. Nc3 dxc4 4. e3 exd4 5. exd4 Bb4 6. Bxc4 Nf6 7. Nf3 O-O 8.
a3 Re8+ 9. Be3 Ba5 10. b4 Bb6 11. O-O Nc6 12. Nd5 *
Position (FEN): r1bqr1k1/ppp2ppp/1bn2n2/3N4/1PBP4/P3BN2/5PPP/R2Q1RK1 b - - 4 12
Black to move.
Themes:  Opening  
Puzzle rating: 1172
Best move: Nxd5