Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Steinitz_Defense
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d3 Bd7 5. c3 a6 6. Ba4 b5 7. Bb3 Nf6 8. O-O
Be7 9. Qe2 O-O 10. Rd1 Bg4 11. Nbd2 Nd4 *
Position (FEN): r2q1rk1/2p1bppp/p2p1n2/1p2p3/3nP1b1/1BPP1N2/PP1NQPPP/R1BR2K1 w - - 10 12
White to move.
Themes:  Middlegame  
Puzzle rating: 1399
Best move: cxd4