Chess puzzle (Advantage)
Opening: Ruy_Lopez, Ruy_Lopez_Exchange_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. Nc3 Bd6 6. d4 exd4 7. Nxd4 Nf6 8.
f4 Bb4 9. O-O Bxc3 10. bxc3 O-O 11. e5 Nd5 12. c4 *
Position (FEN): r1bq1rk1/1pp2ppp/p1p5/3nP3/2PN1P2/8/P1P3PP/R1BQ1RK1 b - - 0 12
Black to move.
Themes:  Middlegame  
Puzzle rating: 1473
Best move: Nc3