Chess puzzle (Advantage)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Ragozin_Defense
Moves: 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 Bb4 5. Bf4 Ne4 6. Qb3 a5 7. e3 O-O 8. a3
Bxc3+ 9. bxc3 Nc6 10. cxd5 exd5 11. c4 dxc4 12. Bxc4 Bd7 13. Qc2 Bf5 14. Bd3
Re8 15. g3 Nxd4 *
Position (FEN): r2qr1k1/1pp2ppp/8/p4b2/3nnB2/P2BPNP1/2Q2P1P/R3K2R w KQ - 0 16
White to move.
Themes:  Middlegame  
Puzzle rating: 1506
Best move: Nxd4