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Subject: Re: evaluation of rybka is not very close to fruit.

Author: Andrew Walker

Date: 22:14:37 02/22/06

Go up one level in this thread


On February 18, 2006 at 20:42:47, Andrew Walker wrote:

>On February 17, 2006 at 19:46:23, Uri Blass wrote:
>
>>Vincent claimed that rybka's evaluation is very close to fruit in the following
>>messgae.
>>
>>http://www.talkchess.com/forums/1/message.html?487109
>>
>>He wrote.
>>
>>"I am for example debugging a position here from a testgame from diep.
>>Where Diep says here +2.3 for white, Zappa says +1.0. Rybka says 0.1 there and
>>Fruit also says 0.1 there."
>>
>>I also analyze positions with rybka and fruit and cannot find the similiarity
>>
>>Here is the last one.
>>
>>237: Uri Blass - Rybka 1.01 Beta 13d 32-bit, 68'/40+68'/40+68'/40
>>[D]7r/5Q2/4r3/5k2/3P1n2/2P5/PP3K2/8 b - - 0 1
>>
>
>I gave Hiarcs 9 a few minutes on this and it sticks to a draw line. Can someone
>please check it with Hiarcs 10?
>
>Thanks,
>Andrew

I can answer my own question, with 2.4 GHz and 512 MB hash, it finds it:

New game - Hiarcs 10
7r/5Q2/4r3/5k2/3P1n2/2P5/PP3K2/8 b - - 0 1

Analysis by Hiarcs 10:

1...Ke4 2.Qb7+ Kf5 3.Kf1 Re2 4.Qd7+ Ke4 5.Qb7+ Kf5
  =  (0.00)   Depth: 8/23   00:00:00  85kN
1...Ke4 2.Qb7+ Kf5 3.Qd7 Rh2+ 4.Kg3 Rh3+ 5.Kf2 Nd3+ 6.Kg2 Nf4+ 7.Kf2
  =  (0.00)   Depth: 9/26   00:00:01  249kN
1...Ke4 2.Qb7+ Kf5 3.Qf7+
  =  (0.00)   Depth: 10/28   00:00:02  521kN
1...Ke4
  =  (-0.25)   Depth: 11/29   00:00:05  1234kN
1...Ke4 2.Qb7+ Nd5 3.Qg7 Rf6+ 4.Kg1 Rhf8 5.Qg4+ Ke3 6.Qh3+ Kd2 7.a4
  =  (-0.25)   Depth: 11/29   00:00:05  1282kN
1...Ke4 2.Qb7+ Nd5 3.Qg7 Rf6+ 4.Kg1 Rhf8 5.Qg4+ Ke3 6.Qh3+ Kd2 7.Qg2+ Kd3
  ³  (-0.49)   Depth: 12/31   00:00:12  3067kN, tb=10
1...Ke4 2.Qb7+ Nd5 3.Qg7 Rf6+ 4.Kg1 Rhf8 5.Qg4+ Ke3 6.Qg2 Kd3
  ³  (-0.64)   Depth: 13/31   00:00:18  4830kN, tb=29
1...Ke4
  µ  (-0.89)   Depth: 14/36   00:00:48  12597kN, tb=127
1...Ke4 2.Qb7+ Nd5 3.Qg7 Rf6+ 4.Kg1 Rhf8 5.Qg4+ Ke3 6.Qg2 Kd3 7.Qxd5 Rg6+ 8.Qg2
Rxg2+ 9.Kxg2 Rb8 10.b3 Kxc3
  -+  (-1.96)   Depth: 14/37   00:01:17  19640kN, tb=286
1...Ke4
  -+  (-2.21)   Depth: 15/39   00:02:10  32561kN, tb=1020
1...Ke4 2.Qb7+ Nd5 3.Qg7 Rf6+ 4.Kg1 Rhf8 5.Qg4+ Ke3 6.Qg3+ Kd2 7.Qg2+ Kd3 8.Qxd5
Rg6+ 9.Qg2 Rxg2+ 10.Kxg2 Rb8 11.d5 Rxb2+
  -+  (-2.31)   Depth: 15/39   00:02:37  39298kN, tb=1372

(,  23.02.2006)



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