I believe this is correct. I worked at T J Watson during this famous match and if I recall the consensus in the halls was that these CMU grads had some interest

I believe this is correct. I worked at T J Watson during this famous match and if I recall the consensus in the halls was that these CMU grads had some interesting hardware hacks but the program was essentially the classic heuristic search with evaluation function. I think computers also have been used to work out some end game solutions