Author: José de Jesús García Ruvalcaba
Date: 11:58:58 07/16/99
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On July 16, 1999 at 14:06:09, Robert Hyatt wrote: >Ok... > > For all you whiners, naggers, complainers, grumblers, bellyachers, and other >lazy bums that won't pony up and buy a 6gig disk, the endgame database probe >idea of your dreams is now ready for testing. :) > >A crafty user (I won't mention names, but it is in the comments in main.c if >you are really interested) submitted some code that looked ok. It is now in >the just released version 16.13... > >Here is what it does. > >If the initial position is a mate in N (tablebase hit), then for each move, >a probe is done. If the move is not mate in N-1, then that move is excluded >from the set of moves to search. This leaves non-tablebase moves, one of which >_must_ lead to a mate in N-1. We now hope Crafty can find it via a search. > >I had to further modify iterate.c, as with the submitted code, crafty would >still think it was in a tablebase position, and stop the search after 4 plies. > >Now you can download the files of your choice with pawns, without having to >grab the promotion cases. It is _still_ probably better to have them, but >at least it will now avoid most of the ugly draws that could happen without >them using the old approach. > >Reports of success or failure always welcome... > >Bob Does it mean that egtb.cpp has been modified? José.
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