Author: Uri Blass
Date: 04:11:25 03/14/04
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On March 14, 2004 at 06:54:07, Uri Blass wrote: >On March 14, 2004 at 06:25:00, GeoffW wrote: > >>Hi >> >>I have been playing a few games with Fruit recently, the thing that I found most >>surprising about it was the amazing time to depth of its search algorithm. My >>progrma is not especially slow but it was lagging usually 1 or 2 ply in the >>opening and 3 or so ply in the middlegame. >>I am sure Fabien said it was a slow searcher in one of his posts !! I wish I >>could make my program as slow a searcher as Fruit :-) > >Fabian talked about nodes per second and it is slow only relative to a fast >searcher like Crafty. > >It is not slow relative to real slow searchers like tscp or Hiarcs or Biglion or >chessmaster or Abrok or Diep or gothmog or chess system tal or Movei(I only >mentioned these programs because I know that they are slow searchers and I do >not care if the reason is not doing optimization(tscp case),Big >evaluation(Diep's case) or expensive search rules(probably the case for part of >the other programs like chessmaster or biglion) or different reasons in the case >of movei. > >I do not know about the speed of your modified tscp in nodes per second and it >may be also faster than your program. > >My reasons include not having function to generate only captures or only >captures and checks when my qsearch generate list of legal moves before finding >the captures and checks and changing it(at least in the qsearch) means also >changing my evaluation because I use the number of legal moves for my mobility >evaluation and I was afraid to change it because it is not a trivial change and >I am afraid from bugs in the process. > >I am sure that a change in my mobility that is not going to count number moves >can be productive both for faster search in nodes per second and for better >evaluation(I should not evaluate backward moves the same as forward moves) but >the problem is that I am less optimistic about my ability to do it without bugs >so I even did not try to do it. > >Uri To make the post more clear the part that begins with my reasons is not connected with the previous 2 lines. I thought to add later that I will add the reasons at the end of the post and simply forgot to do it. Uri
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