Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Open
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5
Be6 9. Bg5 *
Position (FEN): r2qkb1r/2p2ppp/p1n1b3/1p1pP1B1/4n3/1B3N2/PPP2PPP/RN1Q1RK1 b kq - 2 9
Black to move.
Themes:  Opening  
Puzzle rating: 1242
Best move: Nxg5