Author: blass uri
Date: 11:47:51 10/10/98
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On October 10, 1998 at 14:11:47, José de Jesús García Ruvalcaba wrote: >On October 10, 1998 at 14:03:26, blass uri wrote: > >> >>On October 10, 1998 at 13:55:53, José de Jesús García Ruvalcaba wrote: >> >>>On October 10, 1998 at 11:33:14, blass uri wrote: >>> >>>>I think that in some endgames like KRN vs KR you can save space >>>>by defining rules to do the right moves: >>>> >>>>If there is conversion in a small number of plies you can find it by search and >>>>not use the tablebases to tell you the right move >>>> >>> >>>You can do the search if the position is in the root. >>>But what if it appears after a 18 ply search? >>you do not define 18 as small >>you define small only if you are sure that you can do practically the search >>let say less than 8 plies >> >>If the rules for finding the right move does not tell you the right move and it >>is at least 8 plies to conversion you save it in the exceptions. >>I believe that there are not many positions like this. >> >>Uri > >Perhaps I did not state my point clearly. > In the search tree, do appear many weird and ridiculous positions. Imagine that >after a 18 ply search in one leaf node you have a position like KRNKR. It is >unlikely it is a "sane" position. But you need the score, and if it is an exact >one it is best. I need the score for win,draw ,loss if my rules for win,draw ,loss that are not based on search are wrong but I do not need the exact number of moves before I go to KRNKR and when I am in KRNKR I can find the right move by search. I have the following steps when I am in KRNKR: step 1)If position is in the exceptions look in the tablebases for the right move otherwise continue to step 2 step 2)If I find conversion in a small search I play the move that is leading to conversion as soon as possible otherwise I continue to step 3 step 3)I play the move by the rules I defined The problem is to define rules such that the set of the exceptions will be small. I store in the tablebases the set of positions when my score for result by the rules I define is wrong with the right score, and the set of positions when my move is wrong by the rules I define with the right move. Uri > Is it affordable to extend eight more plies on that position? It is very likely >that many more leaf nodes with the same reduced material appear. Is it >affordable to extend eight more plies on an unspecied number of them?
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