Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Morphy_Defense
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Nf6 6. O-O Nxe4 7. Re1 d5 8.
Nxe5 Nxe5 9. f3 Bf5 10. fxe4 *
Position (FEN): r2qkb1r/2p2ppp/p7/1p1pnb2/4P3/1B6/PPPP2PP/RNBQR1K1 b kq - 0 10
Black to move.
Themes:  Middlegame  
Puzzle rating: 1896
Best move: Bg4