Chess puzzle (Advantage)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Chigorin_Variation
Moves: 1. d4 d5 2. Nf3 Nc6 3. g3 Nf6 4. Bg2 Bf5 5. O-O e6 6. c3 Bd6 7. Re1 Qe7 8. b3
h5 9. a4 Ne4 10. a5 g5 11. b4 a6 12. Nfd2 Nxd2 *
Position (FEN): r3k2r/1pp1qp2/p1nbp3/P2p1bpp/1P1P4/2P3P1/3nPPBP/RNBQR1K1 w kq - 0 13
White to move.
Themes:  Middlegame  
Puzzle rating: 1918
Best move: Nxd2