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Subject: Re: Interesting position for static eval test

Author: Dan Ellwein

Date: 18:45:22 03/23/04

Go up one level in this thread


On March 23, 2004 at 16:21:15, Robert Hyatt wrote:

>On March 23, 2004 at 04:35:49, Tord Romstad wrote:
>
>>[D]k1r5/p5n1/1prp3p/5p2/P1PPp1pP/2P1P1P1/3KBP2/1R4B1 w - -
>>
>>This position occured in a blitz game on the ICC with Gothmog (white) against
>>Arasan.  Of course, as is immediately obvious to a human observer, white is
>>dead lost.  It's impossible to activate the bishop on g1, and white is
>>effectively a rook down.
>>
>>To my disgust, Gothmog was quite happy about its position, and showed a small
>>plus score.  And because Arasan appeared to be equally clueless about the
>>position, Gothmog even went on to win after a really ugly endgame.
>>
>>After the game, I decided to check Gothmog's static eval for the position.
>>It thinks that white has an advantage(!) of 0.24 pawns.  Of course it
>>notices the bad mobility for the bishop on g1, but it doesn't understand
>>that it will never be possible to activate the bishop without loss of
>>material.
>>
>>How do other engines evaluate this position?
>>
>>Tord
>
>
>Crafty likes black:
>note: scores are for the white side
>material evaluation.................  -1.30
>development.........................   0.00
>pawn evaluation.....................  -0.27
>passed pawn evaluation..............   0.00
>passed pawn race evaluation.........   0.00
>king safety evaluation..............   0.00
>interactive piece evaluation........   0.63
>total evaluation....................  -0.94

CM9000 personality OffSet sees this position as a draw...

P3/850 64M hash...

Time	Depth	Score	Positions	Moves
0:00	1/5	-0.18	6603		1.Rb5 a6 2.Rb1 Ka7 3.Bh2 Ne6
0:00	1/6	-0.18	12612		1.Rb5 a6 2.Rb1 Ka7 3.Bh2 Ne6
0:00	1/6	-0.14	17959		1.Bh2 Re8 2.Rb5 a6 3.Rb1 Ka7
0:00	1/7	-0.23	53134		1.Bh2 Re8 2.Rb2 Rc7 3.Rb5 Kb8 4.Rd5
0:00	1/7	-0.20	64817		1.Rb3 Re8 2.c5 bxc5 3.Bb5 Rb6 4.dxc5
					dxc5 5.Bxe8 Rxb3
0:01	1/8	-0.18	136588		1.Rb3 Rf8 2.Rb1 h5 3.Rb5 a6 4.Rb1
					Ka7
0:02	1/8	-0.15	201173		1.Kc2 Rb8 2.Bh2 Rf8 3.Rb5 Kb8 4.Kd2
					Rcc8
0:04	1/9	-0.13	390059		1.Kc2 Rb8 2.Ra1 Nh5 3.Rb1 Rc7 4.Rb5
					Ng7 5.Rd5
0:07	1/10	-0.16	672636		1.Kc2 Rb8 2.Ra1 Rc7 3.a5 Rcb7 4.Bd1
					bxa5 5.Rxa5 Rb2+ 6.Kc1 Rb1+ 7.Kd2
					R8b2+ 8.Ke1 Rc2
0:09	1/10	-0.11	964540		1.Rb5 Rb8 2.Rd5 a6 3.a5 bxa5 4.Rxa5
					Rb2+ 5.Ke1 Rb1+ 6.Bd1 Kb7 7.Rd5 Kc7
0:16	1/11	-0.16	1688952		1.Rb5 a6 2.Rd5 Rb8 3.Kc1 Ka7 4.c5
					bxc5 5.dxc5 dxc5 6.Rd7+ Rb7
0:19	1/11	-0.11	2045600		1.Kc2 Rb8 2.Ra1 Rc7 3.a5 Rcb7 4.axb6
					Rxb6 5.Ra2 Ne6 6.Kd2 Rb2+ 7.Rxb2
					Rxb2+ 8.Ke1
0:34	1/12	-0.11	3638209		1.Kc2 Rb8 2.Rb2 h5 3.Ra2 Rbc8 4.a5
					b5 5.c5 a6 6.c4 bxc4 7.Bxc4 dxc5
1:05	2/13	-0.09	7132334		1.Kc2 Rb8 2.Ra1 Rb7 3.a5 Nh5 4.Bh2
					Kb8 5.d5 Rc8 6.axb6 Rxb6 7.Rb1
2:41	3/14	-0.11	17725685	1.Kc2 Rb8 2.Ra1 Rc7 3.a5 Rcb7 4.axb6
					Rxb6 5.Bd1 R8b7 6.c5 dxc5 7.dxc5
					Rc6 8.Rb1 Rxc5 9.Rxb7 Kxb7
7:20	4/15	-0.11	49767297	1.Kc2 Rb8 2.Ra1 a5 3.Bh2 Kb7 4.Rb1
					Rf8 5.Rb5 Ne8 6.Kd2 Nc7 7.d5 Rc5
					8.Rxc5 bxc5
20:59	5/16	-0.11	142848746	1.Kc2 Rb8 2.Ra1 a5 3.Bh2 Kb7 4.Rb1
					Rf8 5.Rb5 Ne8 6.Kd2 Nc7 7.d5 Rc5
					8.Rxc5 bxc5
35:00	5/16	-0.08	237522685	1.Rb5 a6 2.Rd5 Rb8 3.Bd1 Ka7 4.Bb3
					Rb7 5.Ba2 h5 6.a5 bxa5 7.Rxa5 Rb2+
					8.Kc1 Rcb6 9.c5 dxc5 10.dxc5
56:04	6/17	-0.08	386782218	1.Rb5 a6 2.Rd5 Rb8 3.Bd1 Ka7 4.Bb3
					Rb7 5.Ba2 h5 6.a5 bxa5 7.Rxa5 Rb2+
					8.Kc1 Rcb6 9.c5 dxc5 10.dxc5
2:47:09	7/18	-0.06	1158632406	1.Rb5 a6 2.Rd5 a5 3.Ke1 Kb7 4.Kf1
					R8c7 5.Bd1 Rf7 6.Bb3 Rf6 7.Rb5
					Rc8 8.c5 dxc5 9.Bd5+ Ka7 10.dxc5
7:39:09	8/19	-0.16	-1044052721	1.Rb5 a6 2.Rd5 a5 3.Ke1 Kb7 4.Kd2
					R8c7 5.Bh2 Rf7 6.c5 dxc5 7.Bb5
					Rcc7 8.dxc5 Rxc5 9.Rxc5 bxc5 10.Bc4
					Rd7+ 11.Ke2 Nh5 12.Be6
Dan



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