Author: Paulo Soares
Date: 08:24:34 02/03/00
Go up one level in this thread
On February 03, 2000 at 01:46:28, Georg Langrath wrote: >On February 02, 2000 at 18:00:05, Paulo Soares wrote: > >>On February 02, 2000 at 17:49:52, José de Jesús García Ruvalcaba wrote: >> >>>On February 02, 2000 at 17:41:35, Paulo Soares wrote: >>> >>>>On February 02, 2000 at 17:35:55, José de Jesús García Ruvalcaba wrote: >>>> >>>>>On February 02, 2000 at 15:34:32, Georg Langrath wrote: >>>>> >>>>>>On February 02, 2000 at 13:04:57, Rob Shultz wrote: >>>>>> >>>>>>>I ran the following position on Fritz 5.32 and even after 40 minutes it did not >>>>>>>see the win! I was using a PII 450. Junior 5.0 saw the win right away. Is >>>>>>>there some setting I could have changed to cause Fritz to miss this? >>>>>>> >>>>>>>[D]3n4/8/pppN4/k7/2P5/1K6/P7/8 w - - >>>>>>> >>>>>>>The win follows c5. >>>>>>> >>>>>>>Thanks, >>>>>>>Rob >>>>>> >>>>>>It is a bug. As it is a mate in 3 it should be found instantly. Neither newest >>>>>>Fritz 6, nor mate search program in Fritz find it. I have also tried earlier >>>>>>versions of Fritz with the same bad result. >>>>>> >>>>>>Georg >>>>> >>>>> This looks like a classic null-move problem to me: 1. c5 b5 2. a3 and black >>>>>is in zugzwang, if black is allowed to pass at this point it is not a mate in >>>>>three. >>>>>José. >>>> >>>>Yes, if you put selectivity=0, Fritz5.32 found the mate. >>>> >>>>Paulo Soares, from Brazil >>> >>> Does selectivity=0 disable null-move in Fritz? It seems that the new Fritz 6a >>>has some sort of zugzwang detection. >>> >>>José, from México. >> >>Yes, selectivity=0 disable null-move in Fritz. Fritz6(or 6A) >>have no problems with this position, but I don't know the reason. >>Regards from Brazil to Mexico, >>Paulo > >When I tried Fritz 6 has the problem in analyze or mate mode, but not in time >mode. > >Georg Strange, my Fritz6(updated) solves the problem in mate mode. In Analyze mode(infinite analisys), the problem isn't solved. Paulo Soares, from Brazil
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.