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Subject: Re: Hard endgame position

Author: John Merlino

Date: 09:09:41 05/02/05

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On May 02, 2005 at 10:11:41, Mihaly Szalai wrote:

>[D]8/2p1k3/3p3p/2PP1pp1/1P1K1P2/6P1/8/8 w - -
>
>1. g4! fxg4 (1... gxf4 2. gxf5) 2. f5! dxc5+
>(2... Kf6 3. cxd6 cxd6 4. b5 )
>(2... g3 3. Ke3 g4 4. c6 h5 5. b5 h4 6. Ke2!)
>(2... h5 3. Ke3 h4 (3... g3 4. cxd6+ Kxd6 5. f6) 4. Kf2)
>3. bxc5 g3 4. Ke3 g4 5. c6!
>(5. d6+? cxd6 6. c6 d5=) 5... h5 6. f6+ Kxf6 7. d6.

It takes a while, but CMX_R1 on a P4-2.4 eventually finds it:

Time	Depth	Score	Positions	Moves
0:00	5/9	0.28	34148		1.fxg5 hxg5 2.Ke3 Kd7 3.c6+ Kd8
					4.b5 Ke7 5.Kf3 Kd8 6.g4
0:00	6/10	0.24	69081		1.fxg5 hxg5 2.Ke3 Kd7 3.c6+ Kd8
					4.b5 Ke8 5.Kd4 Kd8 6.Kd3 Ke7
0:00	6/10	0.34	83727		1.Ke3 Kd7 2.c6+ Kd8 3.b5 Ke8 4.Kd4
					gxf4 5.gxf4 h5 6.b6 cxb6
0:00	7/11	0.45	126946		1.Ke3 Kd7 2.c6+ Kd8 3.b5 Ke8 4.fxg5
					hxg5 5.Kd4 Ke7 6.Kd3 Ke8 7.Ke3
0:00	8/12	0.24	241150		1.Ke3 Kd7 2.c6+ Kd8 3.b5 Ke8 4.fxg5
					hxg5 5.Kd2 f4 6.gxf4 gxf4 7.Ke2
					Ke7 8.Kf3
0:01	9/13	0.37	435418		1.Ke3 Kd7 2.c6+ Kd8 3.b5 Ke8 4.fxg5
					hxg5 5.Kd2 Ke7 6.Kd3 Ke8 7.Ke3
					Ke7 8.Kd4
0:02	10/14	0.41	901098		1.Ke3 Kd7 2.c6+ Kd8 3.b5 Ke8 4.Kf3
					Ke7 5.g4 fxg4+ 6.Kxg4 gxf4 7.Kxf4
					Kd8 8.Kf3 h5 9.Ke4
0:05	11/15	0.62	1870730		1.Ke3 Kd7 2.c6+ Kd8 3.Kf2 Ke7 4.Kf3
					Kf6 5.b5 g4+ 6.Kf2 Ke7 7.Ke3 h5
					8.Kd4 Ke8 9.Kd3
0:11	12/16	0.49	3908432		1.Ke3 Kd8 2.Kf2 gxf4 3.gxf4 Kc8
					4.cxd6 cxd6 5.Kg3 Kb7 6.Kh4 Kb6
					7.Kh5 Kb5 8.Kg6 Kxb4 9.Kxf5 h5
0:20	13/17	0.35	6861890		1.Ke3 Kd7 2.c6+ Kc8 3.g4 gxf4+
					4.Kxf4 fxg4 5.Kxg4 Kb8 6.Kh5 Ka7
					7.Kxh6 Kb6 8.Kg5 Kb5 9.Kf4 Kxb4
					10.Ke4 Kc5
1:08	14/18	0.00	19853900	1.Ke3 c6 2.fxg5 hxg5 3.dxc6 dxc5
					4.bxc5 Kd8 5.Kd4 Kc7 6.Kd5 f4 7.gxf4
					gxf4 8.Kd4 Kxc6 9.Ke4 Kxc5 10.Kxf4
4:26	14/18	1.29	62210548	1.g4 fxg4 2.f5 h5 3.cxd6+ Kxd6
					4.f6 g3 5.Ke3 h4 6.Kf3 Kd7 7.f7
					Ke7 8.d6+ cxd6 9.b5 g4+ 10.Kg2
					Kxf7 11.b6 Ke6

jm



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