Author: Joachim Rang
Date: 11:44:06 04/29/04
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On April 29, 2004 at 12:19:42, Yar wrote: >Hello Joachim ! > >d6 rxe5 d7 is not the best moves. >The moves here are: >d6! qg5! kf1 rb1+ ke2 qh5+ kd3 qxe5 d7 qb5+ kc3 qc6+ and black has no more then >perp check. > >I asked my friend yesterday to run Shredder 8 on a very fast comp for several >hours for this position (2xOpteron 246 2Gb with 1Gb hash table). After 10+ hours >Shredder was able to find this line: > >Shredder 8: -0,04 depth=26/26 d6 qg5 kf1 rb1+ ke2 qh5+ kd3 qxe5 d7 qb5+ kc3 qc6+ >nc4 qf6+ kc2 qf5+ kc3 qf6+ kc3 qf6+ kc2 = depth 26 wow! I think after rxe5 d7 white has also not more than a draw. > >Position above was created from this position: > >[D]5qk1/p6p/1p4p1/4P1Q1/3P3P/8/P4P2/2r2NK1 b - - 0 1 > >When i found re1! i was sure that black will win (.. re1 h5 re2 qh4 qxh5) >But later i discovered that re1 qd2 rb1 kg2 qd8 d5 rb5 ne3 qxh4 d6 is a draw >(after d5 we have position that i posted above) > >Can your engine find re1 qd2 rb1 ? Shredder 8 finds Qd2 quite quickly. Until depth 21 it prefers Re4 but switches back to Rb1 on depth 21. A very intersting and complicated endgame. So you are suggesting, that [D]5qk1/p6p/1p4p1/4P1Q1/3P3P/8/P4P2/2r2NK1 b - - 0 1 is a draw? regards Joachim > >On April 29, 2004 at 04:47:09, Joachim Rang wrote: > >>On April 29, 2004 at 02:10:15, Yar wrote: >> >>>Hi ! >>> >>>I discovered this postion yestersay during endgame analisys. >>> >>>Can your engine find d6! with a draw score ? >>> >>>[D] 6k1/p6p/1p4p1/1r1PP3/7q/4N3/P2Q1PK1/8 w - - 0 6 >>> >>>With best regards, >>> >>>Yar >> >>Hi Yar, >> >>indeed a very good and tough testposition. I tried Shreder 8 but only after I >>got through the first moves 1.d6 Rxe5 2. d7 he began to realize that black has >>not more than a draw. I think Shredder 8 needs at least an hour on my machine to >>find the move. Do you know engines which find the move rather quickly? >> >>regards Joachim
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