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Subject: Re: The new crafty programs -- some comparisons

Author: Jeremiah Penery

Date: 19:15:53 10/02/03

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On October 02, 2003 at 20:49:53, Dann Corbit wrote:

>On October 02, 2003 at 20:15:25, Jeremiah Penery wrote:
>
>>On October 02, 2003 at 16:00:23, Dann Corbit wrote:
>>
>>>Interesting is the large number of nodes the new 19.4 version examines.  About 3
>>>times as many as the MPC version.
>>
>>About that MPC stuff in Crafty - I tested it some, but the program almost always
>>generated nonsensical lines tending toward a drawscore, even when there was an
>>easy tactical win.  When I removed the code, these lines were seen as normal.
>>
>>Have you done any testing to verify the correctness of the MPC code in those
>>versions of Crafty that you have?
>
>I ran a short contest and the MPC version performed better.
>Maybe it does the pm correctly but clobbers the pv.

It had pm and score completely wrong as well in the tests I did with it.

I'm interested to see you test it on some more tactical positions.  There was
one analysis in particular that I was having trouble on, I'll see if I can find
it in the Archives or something.

It's possible that the MPC code was interacting badly with some other code I
have inserted into Crafty.  I didn't really check it out too much.



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