Author: Uri Blass
Date: 12:29:00 08/12/00
Go up one level in this thread
On August 12, 2000 at 15:13:39, leonid wrote: >On August 12, 2000 at 14:53:58, Uri Blass wrote: > >>On August 12, 2000 at 13:53:30, leonid wrote: >> >>>On August 12, 2000 at 13:24:14, Uri Blass wrote: >>> >>>>On August 12, 2000 at 11:45:21, leonid wrote: >>>> >>>>>On August 12, 2000 at 02:45:06, Christophe Theron wrote: >>>>> >>>>>>On August 12, 2000 at 00:57:46, Angrim wrote: >>>>>> >>>>>>>On August 11, 2000 at 20:30:53, Christophe Theron wrote: >>>>>>> >>>>>>>>But your position is an easy one. Try this one with your favorite chess programs >>>>>>>>and tell me what happens: >>>>>>>> >>>>>>>> >>>>>>>>[D]8/PPPPPpPk/3rq3/1b1r2b1/2BR1B2/3RQ3/pppppPpK/8 w >>>>>>>> >>>>>>>> >>>>>>>>I confess that mine gets nuts on this one. >>>>> >>>>>I very liked position and just added to it some few more pieces for even more >>>>>complexities. Now it contain mate that I don't even know exactly in how many >>>>>moves. Please say exact number if you can. White goes and mate. >>>>> >>>>>Must add to this position: two black bishops on c6 and f6. >>>>> and two white bishops on c3 and f3. >>>> >>>>Impossible with chessbase. >>>>The interface of Hiarcs7.32 does not let me to put 7 pawns and 4 bishops of the >>>>same side. >>>> >>>>7 pawns and 4 bishops mean that 2 of the 4 bishops were pawns in th history. >>>>It means that white had 9 pawns in the history of the game and it means illegal >>>>position. >>>> >>>>I guess that this is the reason that the chessbase interface does not let me to >>>>put the position on the board. >>>> >>>>I think that Genius3 is better because it lets me to put more illegal positions. >>>>I did not check this position but I remember that I could play king and 15 >>>>queens against king and 15 queens with Genius3. >>>> >>>>Unfortunately Genius3 does not let me to put more than 16 pieces for one side so >>>>I could not analyze more comlicated positions with it. >>>> >>>>Uri >>> >>>Interesting! Genius is all the time the best program for mate solution. You did >>>good choice by trying to solve just on it. Genius is very permissive, stable and >>>exact. This position look more like exception. >>> >>>Do your Genius 3 have some problem with graphics? My Genius 2 had. >>> >>>Second very stable and permissive program is Chessmaster. >>> >>>At least 50% of all chess programs I expect to hang on the position like this. >> >>The main problem with the chessbase interface is that it does not let me to put >>the position on the screen. >> >>I do not know if the engines have problems with the illegal positions because I >>cannot get them to analyze the position. > >It is true. I somehow not even look into the fact that only one bishop should be >added to each side. My program is too permissive. > >Take out black bishop from c6 and white from c3. Now you still have the mate but >at much shorter distance. Try this if you want. If you will do this, please say >me on what program, at what computer, and how many moves lead to the mate. If >you could put this positions for others in graphics, it will be nice as well. > >Leonid. [D]8/PPPPPpPk/3rqb2/1b1r2b1/2BR1B2/3RQB2/pppppPpK/8 w - - 0 1 Junior5.9 says 1.g8Q+ is mate in 10. Main line begins with 1.g8Q+ Kxg8 2.b8Q+ In the original illegal position with the bishops at c6 and f6 Genius3 can see no mate in 5 in few minutes and suggests at infinite level 1.g8Q+ analysis continued Kxg8 2.c8Q+ Kg7(Kh7 Be4+(mate in 6)) 3.Qf8+ (mate in 8) so my analysis with Genius also showed mate in 10 in the original position. Uri
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