Chess puzzle (Advantage)
Opening: Nimzowitsch_Defense, Nimzowitsch_Defense_Williams_Variation
Moves: 1. e4 d6 2. Nf3 Nc6 3. d4 g6 4. d5 Ne5 5. Nd4 c5 6. dxc6 Nxc6 7. Bb5 Bd7 8. O-O
Bg7 9. Re1 *
Position (FEN): r2qk1nr/pp1bppbp/2np2p1/1B6/3NP3/8/PPP2PPP/RNBQR1K1 b kq - 5 9
Black to move.
Themes:  Opening  
Puzzle rating: 1056
Best move: Nxd4