Author: Mikael Bäckman
Date: 02:50:57 03/17/04
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On March 17, 2004 at 05:26:30, Sune Fischer wrote: >On March 17, 2004 at 05:17:43, Mikael Bäckman wrote: > >>>Just a single test position to depth 15: >> >> >>Testing on a single position is wrong. >>If you take 20 positions and repeat the test, are the results still the same? >> >>/Mikael > >True. > >I have tested on other positions back when I started using this, but as you can >see it takes a long time for each position so I just tried a single one this >time. >If the search is deep enough I always get the same pattern with the local >overtaking the global. > >It would be interesting to see if Crafty and other engines exibit the same >behavior, I would expect so but one never knows :) > >-S. I can run some tests when I get home, but I would need to know exactly how you 'localize' the HH. Divide with X every N nodes? My history tables in chepla look like history[stm][piece][to], it will be interesting to compare the numbers. One thing to check before running these tests. I had a bug a while ago where my History tables would overtake the good captures in movesorting: I add a base value of B for all good and equal captures. In some deep searches (mostly endgames searches) history values would become greater than B... /Mikael
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