Chess puzzle (Advantage)
Opening: Italian_Game, Italian_Game_Classical_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 a6 5. d4 exd4 6. cxd4 Ba7 7. Nc3 d6 8. h3
Nf6 9. O-O O-O 10. Bg5 h6 11. Bh4 g5 12. Bg3 Na5 13. Bd3 Nc6 14. Bc2 Nh5 15.
Bh2 f5 16. exf5 Bxf5 17. Bxf5 Rxf5 18. Qb3+ Kg7 19. Nd5 *
Position (FEN): r2q4/bpp3k1/p1np3p/3N1rpn/3P4/1Q3N1P/PP3PPB/R4RK1 b - - 3 19
Black to move.
Themes:  Middlegame  
Puzzle rating: 2032
Best move: Na5