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Subject: Re: Endgame Test Position, From Adams-Kasimdzhanov

Author: Dieter Buerssner

Date: 12:39:57 07/09/04

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On July 09, 2004 at 09:37:20, Daniel Jackson wrote:

>The play that would have ensued, 35.Rd5!..Kf8. Does your engine find (36.Rb5!!)?
>
>1r3k2/5ppp/8/3R4/Pp6/1P4P1/5P1P/6K1 w - - 0 36

Yace plays Rb5 as the second move after 1 1/2 minutes, and playes Rb5 after 3
minutes. Then it switches back to Rh6 with Rb5 as second move again, and after
11 minutes plays again Rb5 and stays with it. After a while, it does not expect
that black takes the Rook anymore, and black just gives the pawn for free.

[   nodes   time    score depth]
  53024453  52.548   1.61 12.  36.f4 Ke7 37.Kf2 Ke6 38.Rd4 f5 39.Ke3 h5 40.h4
                               Rb6 41.a5 Ra6 {80}
  66011218  1:06.3   1.60 13t  36.f4 Ke7 37.Kf2 Ke6 38.Rd4 f5 39.Ke3 h5 40.h4
                               Rb6 41.Kd3 g6 42.Kc4 {80}
  93461840  1:34.4   1.61 13t+ 36.Rh5 h6 37.Rb5 Rxb5 38.axb5 Ke7 39.Kg2 Kd6
                               40.Kf3 g6 41.Ke4 f5+ 42.Kd4 Kc7 43.Kc4 Kb7
                               44.Kxb4 Kc7 45.h3 Kb7H 46.f4H Kb8H 47.Kc4H Kc8H
                               48.b6H Kb7H 49.g4H fxg4H {80}
  97180381  1:38.3   1.63 13t  36.Rh5 h6 37.Rb5 Rxb5 38.axb5 Ke7 39.Kg2 Kd6H
                               40.Kf3H Kc5H 41.Ke4H Kxb5H 42.Kd5H h5H 43.f4H
                               Kb6H 44.Kd6H Kb7H 45.h4H Kc8H 46.Kc5H Kd7H
                               47.Kb5H g6H 48.Kxb4H f6H {80}
 183661870  3:09.8   1.64 13t+ 36.Rb5 Rxb5 37.axb5 Ke7 38.Kg2 Kd6 39.Kf3 Kc5
                               40.Ke4 Kxb5 41.Kd5 g6 42.h4 f5 43.Ke6H Kc5H
                               44.Kf6H Kd4H 45.Kg7H h6H 46.Kxh6H Kc3H 47.f4H
                               {HT} {80}
 201082177  3:28.7   1.65 13t  36.Rb5 Rxb5 37.axb5 Ke7 38.Kg2 Kd6H 39.Kf3H
                               Kc5H 40.Ke4H Kxb5H 41.Kd4H g6H 42.h3H f6H
                               43.Ke4H f5+H 44.Kd5H Kb6H 45.Kc4H g5H 46.Kxb4H
                               f4H 47.Kc4H fxg3H 48.b4H h5H 49.Kd5H Kb5H
                               50.fxg3H h4H 51.Ke5H {80}
 203484542  3:31.3   1.65 13.  36.Rb5 Rxb5 37.axb5 Ke7 38.Kg2 Kd6 39.Kf3 Kc5
                               40.Ke4 Kxb5 41.Kd4 g6 42.h3 f6 43.Ke4 f5+
                               44.Kd5 Kb6 45.Kc4 g5 46.Kxb4 f4 47.Kc4 fxg3
                               48.b4 h5 49.Kd5 Kb5 50.fxg3 h4 51.Ke5 {80}
 391983847  6:52.5   2.04 14t  36.Rb5 Rxb5 37.axb5 Ke7 38.f4 Kd6 39.Kf2 Kc5
                               40.Ke3 Kxb5 41.Kd4 g6 42.h4H Kb6H 43.Ke4H Kc6H
                               44.Ke5H Kb6H 45.h5H gxh5H 46.Kf6H Kc6H 47.Kxf7H
                               Kd5H 48.f5H {HT} {0}
 397109857  6:57.7   2.05 14++ 36.Rh5 h6 37.Rb5 Rxb5 38.axb5 Ke7 39.Kg2 Kd6
                               40.Kf3 Kc5 41.Ke4 Kxb5 42.Kd5 h5 43.f4 Kb6
                               44.Kd6 Kb7 45.h4 Kb6H 46.Ke7H Kc6H 47.Kxf7H
                               Kd5H {HT} {80}
 401521019  7:02.5   2.07 14t  36.Rh5 h6 37.Rb5 Rxb5 38.axb5 Ke7 39.Kg2 Kd6H
                               40.Kf3H Kc5H 41.Ke4H Kxb5H 42.Kd5H h5H 43.h4H
                               Kb6H 44.Kc4H Kc6H 45.Kxb4H Kd6H 46.Ka5H Kd5H
                               47.b4H Ke4H 48.b5H Ke5H 49.f4+H Ke6H {80}
 402352957  7:03.4   2.07 14.  36.Rh5 h6 37.Rb5 Rxb5 38.axb5 Ke7 39.Kg2 Kd6
                               40.Kf3 Kc5 41.Ke4 Kxb5 42.Kd5 h5 43.h4 Kb6
                               44.Kc4 Kc6 45.Kxb4 Kd6 46.Ka5 Kd5 47.b4 Ke4
                               48.b5 Ke5 49.f4+ Ke6 {80}
 418491866  7:20.3   2.10 15t  36.Rh5 h6 37.Rb5 Rxb5 38.axb5 Ke7 39.Kg2 Kd6
                               40.Kf3 Kc5 41.Ke4 Kxb5 42.Kd5 h5 43.f4 Kb6
                               44.Kd6 Kb5 45.f5 f6 46.Ke7 Kc5 47.Kf7 Kd4
                               48.Kxg7 Kc3H 49.Kxf6H h4H 50.gxh4H Kd3H 51.Kg6H
                               Kd4H 52.Kg7H Kc3H 53.Kf6H Kd3H 54.Kg6H Kd4H
                               55.Kg7H Kc3H 56.Kf6HR {240}
 616700624 10:57.5   2.11 15t+ 36.Rb5 Rxb5 37.axb5 Ke7 38.f4 Kd6 39.Kf2 Kc5
                               40.Ke3 Kxb5 41.Kd4 g6 42.g4 Kb6 43.g5 Kc6
                               44.Kc4 Kd6 45.Kxb4 Kd5 46.Kb5 f6 47.b4 Ke6
                               48.Kc5 f5 49.b5 Kd7 50.h3 Kc7 51.Kd5 h5H {80}
 782344162 13:59.0   2.47 15++ 36.Rb5 Rxb5 37.axb5 Ke7 38.f4 Kd6 39.Kf2 Kc5
                               40.Ke3 Kxb5 41.Kd4 g6 42.g4 Kb6 43.Ke5 Kc6
                               44.Kf6 Kd5 45.Kxf7 Ke4 46.Kg7 h5 47.gxh5 Kd3
                               48.Kxg6 Kc2 49.h4 Kxb3 50.f5 Kc4H {HT} {160}
1402428935 25:23.9   2.54 15t  36.Rb5 Rxb5 37.axb5 Ke7 38.Kg2 Kd6 39.Kf3 Kc5
                               40.Ke4 h6 41.h4 Kxb5 42.Kd5H Kb6H 43.Kd6H h5H
                               44.f3H f5H 45.Kd5H Kc7H 46.f4H Kd7H 47.Ke5H
                               {HT} {0}
1424607124 25:46.9   2.54 15.  36.Rb5 Rxb5 37.axb5 Ke7 38.Kg2 Kd6 39.Kf3 Kc5
                               40.Ke4 h6 41.h4 Kxb5 42.Kd5 Kb6 43.Kd6 h5 44.f3
                               f5 45.Kd5 Kc7 46.f4 Kd7 47.Ke5 {HT} {0}
2713456215 50:15.7   2.62 16t  36.Rb5 Ra8 37.Rxb4 Ke7 38.h4 g6 39.f4 Kd6
                               40.Kf2 f5 41.Ke3 Ra5 42.Rb7 Rc5 43.b4 Rc3+
                               44.Kd4 {HT} {160}
2754045524 50:58.0   2.62 16.  36.Rb5 Ra8 37.Rxb4 Ke7 38.h4 g6 39.f4 Kd6
                               40.Kf2 f5 41.Ke3 Ra5 42.Rb7 Rc5 43.b4 Rc3+
                               44.Kd4 {HT} {160}

Regards,
Dieter




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