To beat a machine

White to move

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This is a position from a game I played on my lunch hour against a Java applet on the igoogle.com site. I will post the game score to the best of my memory.













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I won the endgame and scored a very infrequent for me at least, win versus the machine.

I wanted to check my accuracy -- Crafty says the following line is +2.19 pawns for white, and the best variation at depth 15.
17. Bxf6 Nxb3 18. Rxg7+ Kf8 19. Rxh7 Ke8 20. Rxd6 Qxd6 21. Rh8+ Qf8 22. Rxf8+ Kxf8 23. Bxd8

23. Bxd8 I had missed when I played axb3 and still won.