Chess puzzle (Advantage)
Moves: 1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. Nf3 Bf5 5. c4 Nb4 6. Na3 e6 7. Bg5 f6 8. Bf4
Be7 9. Be2 O-O 10. O-O N8c6 11. Bd2 Nxd4 12. Bxb4 Nxe2+ 13. Qxe2 Bxb4 14. Rad1
Qe7 15. Nd4 Bg6 16. Qxe6+ Qxe6 17. Nxe6 Rfc8 18. Nb5 c5 19. Nd6 Rc6 20. a3 Ba5
21. Nxb7 Bb6 22. Nbd8 Bxd8 23. Nxd8 Rb6 24. Rd2 Rab8 25. Re1 Rxb2 26. Rd7 Rb1
27. Red1 Rxd1+ 28. Rxd1 Bd3 29. Nc6 Rb7 30. h4 Bxc4 *
Position (FEN): 6k1/pr4pp/2N2p2/2p5/2b4P/P7/5PP1/3R2K1 w - - 0 31
White to move.
Themes:  Endgame  
Puzzle rating: 1909
Best move: Na5