Playing with computer (how to win a stronger opponent)

I would like to submit my recent game with computer. The computer game is Chessmaster 10. My oponent is Josh age 12 (rating in the game - 2100). Josh is a very strong player. Of course I am weaker. Playing with a stronger opponent in positional game would be suicide. In my opinion the only chance for a positive result when you play with a much stronger opponent is trading pieces and hoping for the endgame. With less pieces a stronger opponent has less opportunities to build complex combinations. As a result your chances increase. I played white. Here is the game: