Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: interesting search problem for chess progs in Barons 2nd game

Author: Joachim Rang

Date: 05:12:21 08/10/05

Go up one level in this thread


On August 10, 2005 at 08:03:18, Uri Blass wrote:

>On August 10, 2005 at 07:42:17, Joachim Rang wrote:
>
>>On August 10, 2005 at 07:33:32, Günther Simon wrote:
>>
>>>On August 10, 2005 at 07:14:03, Günther Simon wrote:
>>>
>>>>On August 10, 2005 at 06:49:27, Joachim Rang wrote:
>>>>
>>>>>Peter Svidler defeated The Baron with 1.5-0.5 with a fine vitory with the black
>>>>>pieces. I don't have the pgn (I think they will appear soon on the
>>>>>chesstiger-website) but somehow The Baron lost a piece in the 2nd game and it
>>>>>was no problem for Svidler to convert.
>>>>>
>>>>>regards Joachim
>>>>>
>>>>>P.S.: Btw Shredder crushed Zoltan Almasi 2:0 - but who expected anything else?
>>>>>I'm  a patzer but it seemd Almasi blundered several times.
>>>>
>>>>
>>>>I watched the 2nd Baron game shortly, but I saw immediately that it must
>>>>have blundered a piece already in the early opening, obviously a bug?
>>>>Hopefully Richard can get rid off it before start of the FRC CCC.
>>>>
>>>>Guenther
>>>
>>>It seems it was no bug in The Baron, but a problem for a lot of FRC programs,
>>>at least below depth 12/13?
>>>I tested Glaurung 050802 and Shredder 9.1 for this position:
>>>(I don't understand both programs' PVs for the losing Nexf5??)
>>>
>>>[D]r3kn1r/ppbb1q1p/2p5/3p1n2/3N1P2/2P5/PPBBP2P/2KR2QR w ha - (S-Fen)
>>>
>>>Analysis on my slow 2nd machine (PIII 650, 128MB hash for both)
>>>
>>>Glaurung 050802
>>>  8/23	 0:01 	-0.37 	14.c4 Tg8 15.Df2 dxc4 16.Dh4 c5 17.Sf3 Se4 (195.934) 100
>>>  8/23	 0:03 	-0.29 	14.Dg2 Se4 15.Sexf5 Tg8 16.Dh3 Sxd2 17.Kxd2 Lxf4+ 18.e3
>>>(323.053) 102
>>>  8/23	 0:04 	+0.79 	14.Sexf5 Sxf5 15.Sxf5 O-O-O 16.Dg5 Se6 17.De7 Dxe7 18.Sxe7+
>>>Kb8 (477.654) 101
>>>  9/23	 0:05 	+0.79 	14.Sexf5 Sxf5 15.Sxf5 O-O-O 16.Dg5 Se6 17.De7 Dxe7 18.Sxe7+
>>>Kb8 (508.854) 101
>>> 10/23	 0:06 	+0.76 	14.Sexf5 Sxf5 15.Sxf5 O-O-O 16.Dg5 Sg6 17.Sh6 De7 18.Dxe7
>>>Sxe7 (627.503) 101
>>> 11/23	 0:10 	+1.02 	14.Sexf5 Sxf5 15.Sxf5 Sg6 16.Sh6 Df6 17.De3+ De7 18.Dxe7+
>>>Kxe7 19.e3 Thf8 20.Thg1 (1.092.802) 103
>>> 12/25	 0:16 	+0.99 	14.Sexf5 Sxf5 15.Sxf5 Sg6 16.Sh6 Df6 17.De3+ De7 18.Dxe7+
>>>Kxe7 19.e3 Thf8 20.Thg1 Tf6 (1.688.446) 103
>>> 13/28	 0:45 	-2.60 	14.Sexf5 Sxf5 15.Df2 Sg6 16.e3 O-O-O 17.Thg1 c5 18.Sb3 De7
>>>19.e4 dxe4 20.Sxc5 (4.857.252) 106
>>>
>>>Shredder 9 UCI
>>>  8/21	 0:01 	+0.50 	14.Dg5 Tg8 15.Dh4 Sg6 16.Dh5 O-O-O 17.Sexf5 Sxf5 18.Sxf5
>>>(106.214) 86
>>>  9/20	 0:01 	+0.25--	14.Dg5 Tg8 (158.991) 88
>>>  9/22	 0:02 	+0.19 	14.Dg5 Tg8 15.Dh4 Sg6 16.Dh5 O-O-O 17.Sexf5 Sxf5 18.Sxf5
>>>Tde8 (189.731) 91
>>> 10/23	 0:04 	+0.18 	14.Dg5 Tg8 15.Dh4 Sg6 16.Dh5 O-O-O 17.Sexf5 Sxf5 18.Lxf5
>>>Lxf5 19.Sxf5 (379.648) 94
>>> 10/23	 0:06 	+0.19++	14.Sexf5 (603.582) 96
>>> 10/23	 0:06 	+0.54++	14.Sexf5 (619.399) 97
>>> 10/29	 0:08 	+0.99 	14.Sexf5 O-O-O 15.Sxd6+ Lxd6 16.f5 c5 17.Sb3 La4 18.e4
>>>(803.191) 99
>>> 11/28	 0:12 	+1.20 	14.Sexf5 O-O-O 15.Sxd6+ Lxd6 16.Sb3 Lb8 17.f5 Tg8 18.Df2
>>>(1.243.252) 101
>>> 12/25	 0:17 	+0.95--	14.Sexf5 O-O-O (1.841.875) 103
>>> 12/25	 0:18 	+0.45--	14.Sexf5 O-O-O (1.902.032) 104
>>> 12/28	 0:36 	-2.48 	14.Sexf5 Sxf5 15.Lxf5 Lxf5 16.Dg5 Le4 17.Thg1 Se6 18.Sxe6
>>>Dxe6 19.Le3 Lg6 20.Ld4 O-O (3.875.633) 106
>>> 12/28	 0:36 	-2.47++	14.Dg5 (3.928.638) 106
>>> 12/28	 0:37 	-2.12++	14.Dg5 (3.957.162) 106
>>> 12/28	 0:40 	+0.01 	14.Dg5 Tg8 15.Dh4 Sg6 16.Dh5 Sxf4 17.Dh6 Sg6 18.Thf1 O-O-O
>>>19.Sdxf5 Sxf5 20.Sxf5 Kb8 21.Kb1 (4.307.016) 106
>>>
>>>Guenther
>>
>>
>>oh yes you are correct. Fruit 960 considers this also till depth 10. It seems
>>programs have problems to see that after:
>>
>>
>>15. Nxf5 Bxf5 16. Bxf5 Qxf5 17. Qg7
>>O-O-O 18. Qxh8 Ne6
>>
>>[D]2kr3Q/ppb4p/2p1n3/3p1q2/5P2/2P5/PP1BP2P/2KR3R w - -
>>
>>whites Queen is trapped.
>
>Note that 19.e4 helps to increase the problems of programs to find it because
>they believe that after e4 dxe4 the white queen is not trapped.
>
>Uri


yep you pointed that out correctly...

regards Joachim



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.