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Subject: Re: Programmers: Best direction to further develop Fruit code?

Author: Dann Corbit

Date: 13:09:53 06/20/05

Go up one level in this thread


On June 20, 2005 at 15:42:41, Uri Blass wrote:

>On June 20, 2005 at 15:28:16, Dann Corbit wrote:
>
>>On June 19, 2005 at 17:58:07, Uri Blass wrote:
>>
>>>On June 19, 2005 at 15:18:33, Vincent Diepeveen wrote:
>>>
>>>>On June 19, 2005 at 02:24:52, Roger D Davis wrote:
>>>>
>>>>>Since Fruit is just a notch down from Shredder and Fritz, it looks like that
>>>>
>>>>Fruit is lightyears away from Shredder.
>>>>
>>>>something that might play well in 1 0 because it gets instantly 11 or 12 ply,
>>>>doesn't mean it is having a chance in some serious time control like 60 in 2
>>>>under tournament conditions.
>>>
>>>I do not know if Fruit has problems at long time control(results at 40/40
>>>adapted to speed of PIV 2 ghz suggest that it is number 2 after shredder at
>>>longer time control than 1 minute per game at least if you use nunn type match)
>>>but if it has problems the logical reason that I can see is bugs in the search
>>>that prevent it to go deep enough.
>>>
>>>I already mentioned one bug of extending single replies too much so fruit can
>>>solve the famous mate in 30 in 1 seconds and probably cause it to extend often
>>>useless lines in games).
>>>
>>>Fabien wrote that there are bugs in the search that he still had no time to fix
>>>so he probably meant that there is more than one bug.
>>>
>>>It is possible that Fruit is weaker at long time control(not in nunn type games)
>>>because of positional learning of shredder but I guess that the part of
>>>positional learning can be done by fabien.
>>
>>There is very limited data, but the results I have seen seem to indicate that
>>fruit is even stronger at slower time controls.
>
>1)I see that I made a mistake in my post
>I meant to say that fruit can solve the mate in 30 at depth 1(not in one
>second).
>
>I think that it is wrong and may cause problems espacailly at long time control
>because my guess is that these single reply extensions(instead of partial
>extensions) increase the branching factor of fruit with no significant benefit.
>
>2)The data that I see based on reading posts give me no information if fruit is
>better at long time control.

Did you see the 90 minute plus 30 second contest?



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