Chess puzzle (Advantage)
Opening: London_System, London_System_Other_variations
Moves: 1. Nf3 Nf6 2. d4 g6 3. Bf4 Bg7 4. g3 O-O 5. Bg2 d6 6. Qd2 Ne4 7. Qd3 Bf5 8. Qb3
Nc6 9. Nc3 Nxd4 *
Position (FEN): r2q1rk1/ppp1ppbp/3p2p1/5b2/3nnB2/1QN2NP1/PPP1PPBP/R3K2R w KQ - 0 10
White to move.
Themes:  Middlegame  
Puzzle rating: 980
Best move: Nxd4