Hahah, I knew this was coming sooner or later. Thanks! Great job!
EDIT: This AI is a better player than me.
EDIT: This AI is a better player than me.
I've won once.
The 'technique' I used was to keep the numbers on the left hand edge.
Then using left, down and up built up the rest of the tiles with the movement to left hand edge being the preferred move when it is possible.
I've not managed to repeat the victory yet though.