Author: Robert Hyatt
Date: 13:55:44 04/07/05
Go up one level in this thread
On April 07, 2005 at 15:59:11, Marc D wrote: >On April 07, 2005 at 12:23:25, John Merlino wrote: > >>On April 07, 2005 at 10:42:47, Marc D wrote: >> >>>On April 07, 2005 at 10:37:19, Günther Simon wrote: >>> >>>>On April 07, 2005 at 08:40:46, Marc D wrote: >>>> >>>>>On April 07, 2005 at 08:23:50, Vincent Lejeune wrote: >>>>> >>>>>>I think yes >>>>>> >>>>>>[d]4RQ2/5p2/2q2kp1/3p4/3P2PP/8/1K6/8 b - - 0 1 >>>>>> >>>>>>Is there any program find it (in less than 30 min) ? >>>>> >>>>> >>>>>Analysis by X3D Fritz: >>>>> >>>>>1. +- (2.71): 1...Dc6-b5+ 2.Kb2-c2 Db5-c4+ 3.Kc2-d2 Dc4xd4+ 4.Kd2-e1 Dd4-g1+ >>>>>2. +- (#10): 1...Dc6-b6+ 2.Kb2-c2 Db6-c6+ 3.Kc2-d2 Dc6xe8 4.Df8xe8 >>>>>3. +- (#9): 1...Dc6-b7+ 2.Kb2-c2 Db7-c6+ 3.Kc2-d2 Dc6xe8 4.Df8xe8 >>>>>4. +- (#7): 1...Dc6xe8 2.Df8xe8 Kf6-g7 3.g4-g5 f7-f5 4.De8-e7+ Kg7-g8 5.h4-h5 >>>>>5. +- (#4): 1...Dc6-c1+ 2.Kb2xc1 >>>>> >>>>>After forcing Qc3+ this: >>>>> >>>>>Analysis by X3D Fritz: >>>>> >>>>>2.Kb2xc3 g6-g5 3.Df8-h6# >>>>> +- (#2) Tiefe: 3/16 00:00:00 >>>> >>>> >>>>The question was to find a perpetual draw, not the >>>>quickest help mate (: >>>> >>>>Guenther >>> >>> >>>I don't know how this could be done since all engines (i started) show a favour >>>for white. >>>Neither did any perpetual check (which is not possible) work out. >>>I thought due to this there is no perputual draw chance and i should instead >>>post that it could be actually mate. >>> >>>Sorry my fault :-( >>> >>>Marc >> >>I'm pretty sure that there is a perpetual check available for Black. Where can >>the White King hide from a check? >> >>jm > >Kd3 How does that help? Qc4+ or Qb3+ or Qa3+ or Qb1+ or Qd1+, just depends on where the queen is at the time. Even getting to the f file so that you can interpose with the rook is no good. For example, if Kf3, Qb3+, Re3, Qd1+ Re2, Qf1+ Rf2, Qd3+ or Qd1+ etc. The king has to escape, but he can't. The white queen being out of play is the killer here, if it could get back along with the rook, the checks could be blocked, but it is stuck without a way to interpose and block a check and get back into play.
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