Chess puzzle (Advantage)
Moves: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qe5+ 4. Be2 Bg4 5. d4 Bxe2 6. Ngxe2 Qd6 7. O-O Na6
8. Bf4 Qb4 9. Rb1 O-O-O 10. a3 Qc4 11. b3 Qe6 12. Be3 c6 13. Nf4 Qd7 14. d5 c5
15. Qf3 Nf6 16. Rfd1 h5 17. d6 exd6 18. Na4 Qc6 19. Qxc6+ bxc6 20. c3 Be7 21.
b4 cxb4 22. axb4 g5 23. Ne2 Kb7 24. Bxg5 Rd7 25. Nd4 Nd5 26. Bxe7 Nxe7 27. b5
cxb5 28. Nxb5 Ka8 29. Nxd6 Rhd8 30. Nb6+ *
Position (FEN): k2r4/p2rnp2/nN1N4/7p/8/2P5/5PPP/1R1R2K1 b - - 2 30
Black to move.
Themes:  Middlegame  
Puzzle rating: 981
Best move: axb6