Author: James Robertson
Date: 23:03:25 01/28/00
Go up one level in this thread
On January 29, 2000 at 01:54:44, Dave Gomboc wrote:
>On January 28, 2000 at 21:24:19, Dann Corbit wrote:
>
>>On January 28, 2000 at 21:12:22, walter irvin wrote:
>>
>>>i am doing a experiment with rebel .took away the open book and let it think .i
>>>was just curious to see if it could find any advantage for white in the start
>>>position ? so far 18 ply it likes e4 score +.41 .i think that the start position
>>>is a draw with best play .i think that even a computer like db would not find
>>>any advantage better than .60 .also doing this with sargon III , i found
>>>something that makes no sense to me .after 12 ply it liked e4 but in the pv
>>>about the 5th ply it was giveing away a bishop for nothing although it did not
>>>show up in the score ?? does anyone know how this could be ?????
>>
>>Here is the C.A.P. record for that position:
>>rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - acd 15 acn 326985707; ce
>>-7; pv e4 e6 Nf3 Bb4 Nc3 Ne7 Bc4 Nbc6 O-O O-O d4 Bxc3 bxc3 Na5 Bb5; pm e4; id
>>"C.A.P. 445907";
>>
>>I had better warn you that if anyone starts yelling about black's opening
>>advantage (like on the crafty list server) I'm going to scream. Fortunately,
>>none of you are likely to hear it.
>>
>>You are simply not going to get a very good evaluation from a computer on the
>>opening position. It takes quite a while to develop a good, solid position and
>>computers like to hunt for tactical things. Until you get out of the openings,
>>computer analysis is really going to pale compared to human analysis most of the
>>time.
>>
>>Of course, it is an interesting exercise. I have found that (at least with some
>>older versions) if you let crafty play without an opening book, it liked to play
>>the Sicilian defense (dragon version). I wonder if there are any engines that
>>will play the Orangutan if left on their own?
>>;-)
>
>The negative score is probably due to asymmetric opening position scoring by
>Crafty ("my pieces aren't developed"). The score obviously has the wrong sign,
>as Amir once pointed out.
>
>Dave
Yes, Crafty penalizes itself for undeveloped pieces more than the opponent.
Don't know why. :)
James
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.