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Subject: Re: Strong Endgame-Score from Ruffian (without TBs!)

Author: Jeremiah Penery

Date: 04:05:37 09/25/02

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On September 25, 2002 at 06:34:19, Eduard Nemeth wrote:

>In one from the games it come to this position:
>
>Ruffian 1.0.0 Engine - Genius 3 Engine
>
>[D]8/8/8/8/2R2pk1/8/1r6/5K2 w - - 0 1
>
>
>Ruffian played now Rc3! but not this only, his score was 0.00 !!!!! (without
>Tablebases!), here:
>
>Analysis by Ruffian 1.0.0:
>
>
>70.Tc3 Th2 71.Ta3 Th3 72.Ta2 Kg3 73.Tg2+ Kf3 74.Tf2+ Ke4 75.Tb2 Tf3+ 76.Ke2 Tg3
>77.Kf1 f3 78.Ta2 Tg2 79.Txg2 fxg2+ 80.Kxg2 Kf5 81.Kf2 Kg6 82.Ke1 Kg5 83.Kf1 Kh6
>84.Ke1 Kh7
>  =  (0.00)   Tiefe: 23/36   00:00:27  11394kN
>70.Tc3 Th2 71.Ta3 Th3 72.Ta2 Kg3 73.Tg2+ Kf3 74.Tf2+ Ke4 75.Tb2 Tf3+ 76.Ke2 Tg3
>77.Kf1 f3 78.Ta2 Tg2 79.Txg2 fxg2+ 80.Kxg2 Kf5 81.Kf2 Kg6 82.Ke1 Kg5 83.Kf1 Kh6
>84.Ke1 Kh7
>  =  (0.00)   Tiefe: 24/39   00:00:36  15853kN

>Analysis by Crafty 18.15:
>
>1.Tc8 Ta2 2.Tg8+ Kf3 3.Kg1 Ta5 4.Kh2 Kf2 5.Kh3 Ta3+ 6.Kh4 f3 7.Tf8 Ke2 8.Kg3 Tb3
>9.Te8+ Te3 10.Tf8
>  -+  (-2.52)   Tiefe: 14/28   00:00:25  10393kN
>1.Tc8 Ta2 2.Tg8+ Kf3 3.Kg1 Ta5 4.Kh2 Te5 5.Tg7 Ke3 6.Tf7 f3 7.Kg3 Tg5+ 8.Kh4 Tg6
>9.Te7+ Kf4 10.Kh5
>  -+  (-2.55)   Tiefe: 15/30   00:00:45  19740kN
>
>Crafty plays without Tbs Rc8?!  Score -2.55 !

Rc8 is a draw according to tablebases.  6. Rf7 in Crafty's line is losing, but
the first 5 moves are still drawing.



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