Chess puzzle (Advantage)
Opening: Russian_Game, Russian_Game_Other_variations
Moves: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 Bc5 4. d4 Bb6 5. Bc4 d5 6. exd5 O-O 7. O-O c6 8.
dxc6 Bxd4 9. Ng4 *
Position (FEN): rnbq1rk1/pp3ppp/2P2n2/8/2Bb2N1/8/PPP2PPP/RNBQ1RK1 b - - 1 9
Black to move.
Themes:  Opening  
Puzzle rating: 2000
Best move: Nxg4