Author: Joe Pechie
Date: 18:41:18 12/07/99
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On December 07, 1999 at 19:44:35, Vincent Diepeveen wrote: >Hello to All studiers of the game of chess with a program, > >Here a cool study which has next problems > - some zugzwangs (black getting forced to move the queen) > - the line(s) that win for white are forced till the end (singular) > >7k/2q3pP/6P1/8/8/8/6Pp/2RR3K/w - - > >black timeleft=666:40.00.00 > - = - = - = - k ... 1 ... > = - q - = - o O ... 2 ... > - = - = - = O = ... 3 ... > = - = - = - = - ... 4 ... > - = - = - = - = ... 5 ... > = - = - = - = - ... 6 ... > - = - = - = O o ... 7 ... > = - R R = - = K ... 8 ... >white timeleft=666:40.00.00 >white to move > >I estimated that for a program doing checks in qsearch >and NOT having any extension and not having hashtable luck >the solution is 22 ply to see. 23 ply otherwise. > >the solution is not found yet by my program (running >at a dual celeron 550 with 300mb hash now under linux of >cuz), as it's PVs are crap so far and it gives black the >chance to sac queen somewhere near end of pv. > >I'm not a dreamer so i'm not gonna ask for an output >of deep blue junior, but i love to see whether other >progs make a chance here. > >It's adviced to use KRPKP and KPKP KPK >egtb at least for this position, that should produce when >seeing the good lines a score at HUGE depths of mate in XXX >or something of over +15.0 > >I'm not using them with diep here, so perhaps diep never finds it... >...i just pray for transposition luck right now... ...right now >score is +7.7 which is by accident also the score for KRP KP here >but i guess it didn't see it yet. > >Vincent It took 9 minutes of searching with junior 5.0 and a 233mhz pent to find rc4 at depth-19. Will let it chug away on this one for a while Joe
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