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Subject: Re: amazing endgame RB vs PPPP

Author: John Merlino

Date: 11:30:22 02/04/06

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On February 04, 2006 at 10:40:01, Vincent Lejeune wrote:

>
>I suppose Rybka (black) play the blunder 67...Kd4 ?and throw away the win, I
>suppose it didn't have EGTB's.
>
>[d]3b3r/3P1P2/3K4/4P3/7P/3k4/8/8 b - - 0 67
>
>After some learning with H10 I get a mate score
>Analysis by Hiarcs 10:
>
>67...Re4 68.e6 Rd4 69.h5 Fb6 70.d8T Txd8+ 71.Re7 Ta8 72.Rd6 Fc5+
>  -+  (-#25)   Profondeur: 15/25   00:00:00  98kN, tb=29
>67...Re4 68.e6 Rd4 69.h5 Fb6 70.d8T Txd8+ 71.Re7 Ta8 72.Rd6 Fc5+
>  -+  (-#25)   Profondeur: 16/29   00:00:04  1095kN, tb=551

Kc4 appears to work as well. Here's what CM9_R1 on a P4-2.4 says:

Time	Depth	Score	Positions	Moves
0:00	1/6	-0.13	38083		67...Ke4 68.e6 Ba5 69.Kc5 Rb8 70.Kd6
					Bb4+ 71.Kc7
0:00	1/6	-0.16	43962		67...Ba5 68.e6 Kd4 69.Kc6 Bb4 70.Kc7

0:00	1/7	-0.18	122814		67...Ba5 68.Kc5 Kc3 69.e6 Bb4+
					70.Kc6 Kd3 71.h5
0:00	1/8	-0.07	217943		67...Ba5 68.Kc5 Be1 69.e6 Bxh4
					70.Kd6 Kd4 71.e7 Bg3+ 72.Ke6 Rh6+
					73.Kf5
0:01	1/8	-0.48	294374		67...Kd4 68.e6 Ba5 69.d8=Q Rxd8+
					70.Ke7 Rc8 71.Kd7 Rc7+ 72.Ke8
0:01	2/9	-1.41	365497		67...Kd4 68.h5 Ba5 69.Ke6 Ke4 70.Kf6
					Bc3 71.Ke7 Bb4+ 72.Kf6
0:02	3/10	-1.27	566697		67...Kd4 68.h5 Ba5 69.Ke6 Ke4 70.Kf6
					Bc3 71.Ke7 Bb4+ 72.Kf6 Rh6+ 73.Kg7
0:04	4/11	-1.08	1049016		67...Kd4 68.h5 Ba5 69.Ke6 Bb4 70.Kf5
					Kd5 71.h6 Rf8 72.e6 Kd6
0:10	5/12	-1.31	2899237		67...Kd4 68.h5 Ba5 69.Ke6 Bb4 70.Kf6
					Kd5 71.h6 Bc5 72.Kg7 Rb8 73.h7
					Bf8+ 74.Kg6 Rb6+ 75.Kf5
0:19	5/12	-1.75	5604415		67...Kc4 68.e6 Kd4 69.h5 Ba5 70.d8=Q
					Rxd8+ 71.Ke7 Ra8 72.Kf6 Bd8+ 73.Kg6
					Be7 74.h6 Rh8
0:27	6/13	-2.08	8253998		67...Kc4 68.e6 Kd4 69.h5 Ba5 70.d8=Q
					Rxd8+ 71.Ke7 Ra8 72.Kf6 Bb4 73.h6
					Kd5 74.e7 Ra6+ 75.Kg7 Bxe7
0:57	7/14	-2.26	18326769	67...Kc4 68.e6 Kd4 69.h5 Ba5 70.d8=Q
					Rxd8+ 71.Ke7 Ra8 72.Kf6 Bd8+ 73.Kf5
					Be7 74.h6 Rh8 75.Kg6 Bf8

jm



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