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Subject: Re: Impressive endgame move and a testposition.......!

Author: John Merlino

Date: 12:18:24 08/09/05

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On August 09, 2005 at 09:24:43, George Tsavdaris wrote:

> An equal game that turned to a win due to a weakness at the endgame of the
>Chess Genius 2.0.
>At move 54 although other moves probably win too, XXX-9 played the pretty
>54...f5! with a very high score, that wins quickly and easily......
> Any other engines find this...? Unfortunatelly other plans must win also, so
>this is actually not a good testposition......
>
>[D]8/3k1p2/8/2n3p1/p1P1p1Pp/2N1P2P/3K1P2/8 b - - 0 54

CM9_R1 on an AMD 2500 likes a3 for quite some time, then switches to Ke7 to be
immediately followed by f5:

Time	Depth	Score	Positions	Moves
0:00	1/5	-1.19	2988		54...a3 55.Kc2 Ke6 56.Kb1 f5 57.gxf5+
					Kxf5
0:00	1/6	-0.85	7667		54...a3 55.Kc2 Nd3 56.f4 gxf4 57.Nxe4
					a2
0:00	1/7	-1.07	27452		54...a3 55.Kc2 Nd3 56.f4 gxf4 57.Nxe4
					a2 58.Nf6+ Kc6
0:01	1/8	-1.33	67353		54...a3 55.Kc2 Nd3 56.Kb3 Nxf2
					57.Kxa3 Nxh3 58.Nxe4
0:02	2/9	-1.23	83876		54...a3 55.Kc2 Nd3 56.Kb3 Nxf2
					57.Kxa3 Nxh3 58.Nxe4 Kc7 59.Kb4
0:03	3/10	-1.40	152423		54...a3 55.Kc2 Nd3 56.f4 gxf4 57.exf4
					Nf2 58.Kb3 e3 59.Kxa3 Nxh3 60.Ne2
0:04	4/11	-1.61	355483		54...a3 55.Kc2 Nd3 56.f4 gxf4 57.exf4
					Nf2 58.Kd2 Nxh3 59.Ke3 Kc6 60.Nxe4
					a2
0:06	5/12	-1.97	980631		54...a3 55.Kc2 Nd3 56.Kb3 Nxf2
					57.Kxa3 Kd6 58.Kb4 Nxh3 59.Nxe4+
					Ke5 60.Nd2 Nf2 61.Nf3+ Kf6
0:09	6/13	-1.78	1903549		54...a3 55.Kc2 Nd3 56.f4 gxf4 57.exf4
					Nb4+ 58.Kb3 a2 59.Kb2 e3 60.f5
					f6 61.Ne2 Kd6 62.Ka1
0:24	7/14	-1.84	6776343		54...a3 55.Kc2 a2 56.Kb2 Nd3+ 57.Kxa2
					Nxf2 58.Kb3 Kd6 59.Kc2 Ke5 60.c5
					Nxh3 61.c6 Kd6 62.Nxe4+ Kxc6 63.Kd3
0:57	8/15	-1.71	17431949	54...a3 55.Kc2 Nd3 56.f4 gxf4 57.exf4
					Nb4+ 58.Kb3 a2 59.Kb2 e3 60.f5
					f6 61.c5 Kc6 62.Ka1 Nd3 63.Kxa2
					Kxc5
1:44	8/15	-1.88	32874668	54...Ke7 55.Kd1 f5 56.gxf5 Kf6
					57.Ke2 a3 58.f3 Kxf5 59.Na2 exf3+
					60.Kxf3 Ne4 61.Kg2 g4 62.hxg4+ Kxg4
2:34	9/16	-1.96	49124122	54...Ke7 55.Kd1 f5 56.gxf5 Kf6
					57.Ne2 Nd3 58.Nc3 Nxf2+ 59.Ke2
					Nxh3 60.c5 Kxf5 61.c6 Ke6 62.Nxe4
					Ng1+ 63.Kf2

jm



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