Go, a.k.a. Badu (South Korea) and Wei-chi (China), is considered
to be the ultimate thinking game. Its simple rules hide a game
of enormous depth. In consequence computers, who have mastered
Chess, have only reached low amateur status in Go.
The Go++ engine was written by Mick Reiss, who has worked on
it for 20 years. It has won many competitions and was invariably
ranked with the top 2 programs.