Chess puzzle (Advantage)
Moves: 1. d4 g6 2. Bf4 Bg7 3. c3 Nf6 4. Nd2 d6 5. e4 Nbd7 6. Ngf3 O-O 7. Qc2 c5 8. Nb3
b6 9. O-O-O a5 10. Be2 a4 11. Nbd2 Ba6 12. Rhe1 Bxe2 13. Rxe2 b5 14. e5 Ne8 15.
d5 b4 16. c4 dxe5 17. Nxe5 Nxe5 18. Bxe5 Bh6 19. Kb1 Qa5 20. Ne4 Nc7 21. f4 f6
22. Bxc7 Qxc7 23. g3 Rfb8 24. Rd3 Qb6 25. d6 exd6 26. Nxd6 b3 27. axb3 *
Position (FEN): rr4k1/7p/1q1N1ppb/2p5/p1P2P2/1P1R2P1/1PQ1R2P/1K6 b - - 0 27
Black to move.
Themes:  Middlegame  
Puzzle rating: 1136
Best move: axb3