Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Exchange_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. c3 Bd6 6. O-O Bg4 7. d4 exd4 8.
cxd4 Nf6 9. Re1 Bxf3 10. Qxf3 Bb4 11. Bd2 Bxd2 12. Nxd2 O-O 13. e5 Qxd4 *
Position (FEN): r4rk1/1pp2ppp/p1p2n2/4P3/3q4/5Q2/PP1N1PPP/R3R1K1 w - - 0 14
White to move.
Themes:  Middlegame  
Puzzle rating: 1125
Best move: Nb3