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Christoph Birk wrote:
> On Tue, 2 Oct 2007, Don Dailey wrote:
>> He wasn't talking about reading at all.   I was being nice when I said
>> he wasn't talking about that kind of reading - giving you the benefit of
>> the doubt.
> 
> Please explain what he meant by "calculating about as deeply".


Hsu thinks in terms of chess programming and from the article he was
comparing the depth of the search of Chess to Go,  trying to make a case
that with modern hardware you would be able to search to the same depths
that Deep Blue used to search in chess.    So a chess search normally
iterates until it runs out of time - searching 1 ply, then 2, then 3 etc.

So when he says "as deeply" he means that if Deep blue did a 12 ply
search (for instance) he thought a Go program might manage a 12 ply
search (I disagree, but that's beside the point.)

Of course 12 ply doesn't really mean exactly 12 ply - it means a highly
selective search where you might look up to 20 or 30 ply with extensions
and quiescence.    I'm using 12 ply as an example, I don't know how deep
Deep Blue actually searched.

In Chess it is very common for good players to look very deeply in
tactical situations and endgames.  There is nothing special about
searching this deeply in chess, it's done in most 2 player games of
perfect information and of course in Go it's called "reading."

- - Don




> Thank you,
> Christoph
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> 
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