Author: Robert Hyatt
Date: 05:52:22 02/29/00
Go up one level in this thread
On February 28, 2000 at 16:50:55, Eugene Nalimov wrote: >On February 28, 2000 at 16:48:38, Robert Hyatt wrote: > >>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. > >Do a full 4-moves search when root position is TB hit. > >Eugene This doesn't work with current code. I could do a 20 ply search, but I get the TB hit at ply=2 and go no further.
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