Chess puzzle (Advantage)
Opening: Sicilian_Defense, Sicilian_Defense_Snyder_Variation
Moves: 1. e4 c5 2. b3 Nc6 3. Bb2 Nf6 4. f3 g6 5. Bb5 Bg7 6. Bxc6 bxc6 7. e5 Nd5 8. c4
Nb4 9. d4 cxd4 10. Bxd4 d6 11. a3 c5 12. Bc3 Nc6 13. exd6 Bxc3+ 14. Nxc3 Nd4
15. dxe7 Qxe7+ 16. Nge2 Bf5 17. O-O Qe3+ 18. Kh1 O-O 19. Re1 Nxf3 *
Position (FEN): r4rk1/p4p1p/6p1/2p2b2/2P5/PPN1qn2/4N1PP/R2QR2K w - - 0 20
White to move.
Themes:  Middlegame  
Puzzle rating: 1765
Best move: Nd5