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Subject: High branching factor games

Author: Russell Reagan

Date: 21:34:45 11/26/02


While I was at work tonight sitting at a computer, having nothing to do, I
opened up the calculator program and started playing around with the branching
factor for the game of go. I quickly realized that with such a large branching
factor at each level (361 from the starting position), it's no wonder computer
go programs play well below master level.

Are there any games that have a high branching factor that computers are good
at? The only games that I'm somewhat familiar with are chess, checkers, and go.
Of those, it seems that the branching factor of the game largely determines how
well computers play them. It seems that checkers with the lowest branching
factor gives humans the hardest time, then chess, and then go with a much larger
branching factor is not even in the same ballpark with the top humans.

Does this relationship between branching factor and computer strength hold for
other games? Or do some games break the pattern? If some games do break the
pattern, why? Simplicity of the game? Magical shortcuts?

Russell



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