Author: Robert Hyatt
Date: 13:48:38 02/28/00
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On February 28, 2000 at 15:51:58, Andrew Dados wrote: >On February 28, 2000 at 13:49:59, Robert Hyatt wrote: > >>On February 28, 2000 at 10:35:29, David Eppstein wrote: >> >>>On February 28, 2000 at 08:45:32, Robert Hyatt wrote: >>>>On February 28, 2000 at 03:00:24, Gregor Overney wrote: >>>>>How large is KQQKQP? How about KPPKPP? >>>> >>>>First, you can forget kppkpp for a long while. The file will be huge and there >>>>are a _bunch_ of other 6-piece files that have to be completed first. >>> >>>I would think that all of the KxxKyy should be about the same size as each >>>other, and all of the KxxKyz should be about the same size as each other. >> >> >>It depends. IE if the max mate is <= 127, then 1 byte per entry is enough. >>If we get some that have a max mate in 400, they will take forever to compute, >>and they will be bigger. And then there is compression. If a particular >>ending is mostly drawn, the database compresses like crazy. If it is not >>mostly drawn, it doesn't compress as well. > >How important is it to store exact mate in x and not, say, mate in x div 4, >assuming whole database woul be flagged as 'div4'? Progress at root can then be >determined by shallow search till depth 8... (or mate div 3 and search till >d=6). Or am I missing something? >-Andrew- >[snip] How would you force mate? IE you get to choose between mate in N scores, where for one move n=131/4 and in the other case it is 130/4. If you take the 131/4, you will again have to choose between 131/4 and 130/4 the next time. And you might run afoul of the 50-move rule as a result.
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