Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Exchange_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. Nxe5 Qd4 6. f4 Qxe4+ 7. Qe2 Qxe2+
8. Kxe2 Bd6 9. Nc4 Bxf4 10. Kf3 Bd6 11. Re1+ Ne7 12. d3 O-O *
Position (FEN): r1b2rk1/1pp1nppp/p1pb4/8/2N5/3P1K2/PPP3PP/RNB1R3 w - - 1 13
White to move.
Themes:  Middlegame  
Puzzle rating: 1170
Best move: Nxd6