Chess puzzle (Crushing)
Opening: Italian_Game, Italian_Game_Giuoco_Pianissimo
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. h3 h6 6. O-O d6 7. Nc3 g5 8. a3 g4
9. hxg4 Bxg4 10. b4 Bb6 11. Na4 *
Position (FEN): r2qk2r/ppp2p2/1bnp1n1p/4p3/NPB1P1b1/P2P1N2/2P2PP1/R1BQ1RK1 b kq - 2 11
Black to move.
Themes:  Middlegame  
Puzzle rating: 1597
Best move: Nd4