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[computer-go] Hydra search techniques



Hello,

Not really a Go issue but, since I think i will get the answer here :):
- I saw in Hydra web page that hydra uses pruning techniques to reduce the search tree. And since with same evaluation speed hydra gets quite lot deeper than Deep Blue I can see that it does. Does that mean normal alpha-beta optimizations or are some moves completely pruned i.e. not part of the search at all? I saw such a claim made for Deep Junior. To me this is bit like old times. In seventies all computers use plausible move generators.

- In this "controversial" second game between Kasparov and Deep Blue, Deep Blue makes "un-computer like move". Whatever that means. What move would hydra make? Would it take the bait or make nice positional defensive move?


Petri Pitkänen

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