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Subject: Re: Testposition: easy for human, hard for computers!

Author: John Merlino

Date: 09:40:29 04/01/04

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On March 31, 2004 at 09:13:59, Eduard Nemeth wrote:

>Composition Eduard Nemeth
>
>[D]4nBRR/4P1PP/3pKn2/8/4P3/8/6k1/8 b - - 0 1
>
>Black wins.
>
>My german comment, you can find on my website
>
>http://www.beepworld.de/members37/computerschach/
>
>under "Schach-Augenblicke" Issue 02.
>
>Eduard.

Chessmaster 9000, SKR personality on an AMD 1800+, says this:

Time	Depth	Score	Positions	Moves
0:00	1/10	10.84	144260		1...Nxe4 2.Kd5 N4f6+ 3.Kd4 Nc7
					4.Kc4 Kf3 5.Kd3 Kf4 6.Ke2 Ke5
0:01	2/11	10.91	276902		1...Nxe4 2.Kf7 N4f6 3.Kg6 d5 4.Kf5
					d4 5.Kf4 Kf1 6.Kf3 Nd6
0:01	3/12	10.55	554561		1...Nxe4 2.Kd5 N4f6+ 3.Kc4 Kf3
					4.Kb3 Ke3 5.Kc2 Kf4 6.Kd2 Ke5 7.Ke1
					Nc7
0:02	4/13	10.30	942793		1...Nxe4 2.Kf7 N4f6 3.Kg6 d5 4.Kf5
					d4 5.Kf4 Kf1 6.Kf3 Nd6 7.e8=Q Nfxe8
					8.Be7 Nxg7 9.Bxd6
0:05	5/14	10.12	2147221		1...Nxe4 2.Kd5 N4f6+ 3.Kc4 Kf3
					4.Kb3 Ke3 5.Kb2 Kd4 6.Kc2 Nd5 7.Kd2
					Nef6 8.Kc1 Ke5
0:11	6/15	9.90	4230819		1...Nxe4 2.Kd5 N4f6+ 3.Kc4 Kf3
					4.Kb3 Ke3 5.Kb2 Kd4 6.Kc2 Ne4 7.Kd1
					N8f6 8.Kc1 Kd5 9.Kc2 Ke5
0:23	7/16	9.71	9295390		1...Nxe4 2.Kd5 Kf3 3.Kc4 Kg4 4.Kd3
					Nc5+ 5.Kd4 Ne6+ 6.Kc3 Kf5 7.Kb4
					Kg6 8.Kb5 Kf5 9.Kb6 Nf6 10.e8=Q
					Nxe8
0:52	8/17	9.66	20978167	1...Nxe4 2.Kd5 Kf3 3.Kd4 Kf4 4.Kd3
					Ng3 5.Kc2 Nf5 6.Kc3 Ke5 7.Kd3 Ke6
					8.Kd2 Nf6 9.Kc1 Nd4
1:47	9/18	9.26	43791762	1...Nxe4 2.Kd5 Nc5 3.Kd4 Kf2 4.Kc4
					Nd7 5.Kd5 Ke2 6.Ke6 Ndf6 7.Kf5
					d5 8.Kg6 d4 9.Kf5 d3 10.Ke6 Ne4
1:54	9/18	0.00	47493175	1...Kf3 2.e5 dxe5 3.Kxe5 Ke3 4.Kf5
					Kf3 5.Kg5 Kg3 6.Kg6 Kg4 7.Kf7 Kf5
2:21	10/19	0.00	62101364	1...Kf3 2.e5 dxe5 3.Kxe5 Ke3 4.Kf5
					Kf3 5.Kg5 Kg3 6.Kg6 Kg4 7.Kf7 Kf5
3:34	11/20	0.00	101461833	1...Kf3 2.e5 dxe5 3.Kxe5 Ke3 4.Kf5
					Kf3 5.Kg5 Kg3 6.Kg6 Kg4 7.Kf7 Kf5
6:08	12/21	0.00	183362925	1...Kf3 2.e5 dxe5 3.Kxe5 Ke3 4.Kf5
					Kf3 5.Kg5 Kg3 6.Kg6 Kg4 7.Kf7 Kf5
11:42	13/22	0.00	357231093	1...Kf3 2.e5 dxe5 3.Kxe5 Ke3 4.Kf5
					Kf3 5.Kg5 Kg3 6.Kg6 Kg4 7.Kf7 Kf5
25:11	14/23	0.00	755606542	1...Kf3 2.e5 dxe5 3.Kxe5 Ke3 4.Kf5
					Kf3 5.Kg5 Kg3 6.Kg6 Kg4 7.Kf7 Kf5
55:21	15/24	0.00	1635382078	1...Kf3 2.e5 dxe5 3.Kxe5 Ke3 4.Kf5
					Kf3 5.Kg5 Kg3 6.Kg6 Kg4 7.Kf7 Kf5
1:27:21	15/24	-Mate19	2447877336	1...Nxe4 2.Kd5 N4f6+ 3.Kd4 Kf3
					4.Kd3 d5 5.Kd4 Ke2 6.Kc3 Ke3 7.Kc2
					d4 8.Kb3 d3 9.Kb2 Nd5 10.Kb3 d2
					11.Kc2 Ke2 12.Kb3 d1=Q+ 13.Kc4
					Qd3+ 14.Kc5 Nc3 15.Kb4 Kd2 16.Ka3
					Qa6+
2:26:24	16/25	-Mate19	4221414308	1...Nxe4 2.Kd5 N4f6+ 3.Kd4 Kf3
					4.Kd3 d5 5.Kd4 Ke2 6.Kc3 Ke3 7.Kc2
					d4 8.Kb3 d3 9.Kb2 d2 10.Kc2 Ke2
					11.Kb3 d1=Q+ 12.Kb2 Ke3 13.Ka2
					Qc2+ 14.Ka3 Kf4 15.Kb4 Nd5+ 16.Ka3
					Qc3+
4:53:33	17/26	-Mate17	216819522	1...Nxe4 2.Kd5 N4f6+ 3.Kd4 Kf3
					4.Kd3 d5 5.Kd4 Ke2 6.Kc3 Ke3 7.Kc2
					d4 8.Kb3 d3 9.Kb2 d2 10.Kc2 Ke2
					11.Kb3 d1=Q+ 12.Kb2 Qd2+ 13.Kb3
					Kd3 14.Ka4 Kc4 15.Ka3 Qb4+ 16.Ka2
					Kc3
10:15:53	18/27	-Mate17	2087523200	1...Nxe4 2.Kd5 N4f6+ 3.Kd4 Kf3
					4.Kd3 d5 5.Kd4 Ke2 6.Kc3 Ke3 7.Kc2
					d4 8.Kb3 d3 9.Kb2 d2 10.Kc2 Ke2
					11.Kb3 d1=Q+ 12.Kb4 Ke3 13.Kb5
					Qb3+ 14.Kc6 Nd5 15.Kd7 Qb5+ 16.Kd8
					Nd6

This behavior seems very similar to that of Yace.

jm



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