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Subject: Re: Update for results at fixed depth between Fritz and Tiger

Author: Uri Blass

Date: 23:43:23 04/22/01

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On April 23, 2001 at 02:17:26, Tanya Deborah wrote:

>On April 22, 2001 at 12:29:34, Uri Blass wrote:
>
>>Tiger14(depth 3)-Deep Fritz(depth 3) 16.5-3.5
>>Tiger14(depth 4)-Deep Fritz(depth 4) 7.5-12.5
>>Tiger14(depth 5)-Deep Fritz(depth 5) 13-7
>>Tiger14(depth 6)-Deep Fritz(depth 6) 14-6
>>Tiger14(depth 7)-Deep Fritz(depth 7) 13.5-6.5
>>Tiger14(depth 8)-Deep Fritz(depth 8) 10.5-9.5
>>Tiger14(depth 9)-Deep Fritz(depth 9) 14-6
>>Tiger14(depth 10)-Deep Fritz(depth 10) 9.5-10.5
>>
>>Tiger14(depth 4)-Deep Fritz(depth 3) 17.5-2.5
>>Tiger14(depth 5)-Deep Fritz(depth 4) 19-1
>>Tiger14(depth 6)-Deep Fritz(depth 5) 18-2
>>Tiger14(depth 7)-Deep Fritz(depth 6) 15-5
>>
>>Tiger14(depth 3)-Deep Fritz(depth 4) 6-14
>>
>>Tiger14(depth 4)-Deep Fritz(depth 5) 8-12(this result should be 12.5-7.5 but
>>deep fritz failed to mate because of having only part of the tablebases and the
>>engines agreed to a draw in a position that the evaluation was mate against
>>tiger).
>>
>>Tiger14(depth 5)-Deep Fritz(depth 6) 7-13
>>Tiger14(depth 6)-Deep Fritz(depth 7) 8-12
>>Tiger14(depth 7)-Deep Fritz(depth 8) 7-13
>>
>>The advantage of one ply seems to be very significant in the nunn match and you
>>can see that the side that searched deeper won in all the matches.
>>
>>Deep Fritz at depth X seems to be 100 about elo better than Tiger at depth X-1
>>when Tiger14 at depth X seems to be more than 200 elo better than Tiger14.
>>
>>It means that at small depthes 1 ply is probably worth at least 150 elo rating
>>for the nunn match.
>>There is of course a significant statistical error and we need more games.
>>
>>Uri
>
>Very interesting Uri!

Here are more results
Tiger14(depth 8)-Deep Fritz(depth 7) 14-6
Deep Fritz(depth 9)-Tiger14(depth 8) 12.5-7.5
Tiger14(depth 9)-Deep Fritz(depth 8) 8.5-1.5(this match was not finished because
I stopped it in the middle)

>
>But how did you make that Fritz move when it is on depth4 or 5 ??
>I believe that many of this games (at depth 3,4,or5) take only a few seconds.
>Is this right?

Correct games at these depthes takes only few seconds so I could finish the nunn
match at small depthes in few minutes.

I have some more results at small depthes(this time of Gambittiger2 against Deep
Fritz

Gambit2(depth 3)-Deep Fritz(depth 3) 8.5-11.5
Gambit2(depth 4)-Deep Fritz(depth 4) 10.5-9.5
Gambit2(depth 5)-Deep Fritz(depth 5) 13-7
Gambit2(depth 6)-Deep Fritz(depth 6) 12-8

Gambit2(depth 3)-Deep Fritz(depth 4) 4.5-15.5
Gambit2(depth 4)-Deep Fritz(depth 3) 16.5-3.5
Gambit2(depth 4)-Deep Fritz(depth 5) 9.5-10.5
Gambit2(depth 5)-Deep Fritz(depth 4) 17-3

You can see that the Deeper searcher at shallow depthes is always winning the
match if you use tiger and fritz.




>
>If the program using a 8x procesor machine against Kramnink, see one ply more
>than the normal fast machine, how strong will be ?? in elo??

I do not know.

I believe in diminishing return and the results seem to suggest diminishing
return but I need more games to prove it stattistically.

Uri
>
>Tanya.



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