Author: Marc Plum
Date: 06:16:05 05/31/99
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On May 31, 1999 at 06:26:22, blass uri wrote: > >On May 31, 1999 at 06:04:36, blass uri wrote: > >> >>On May 31, 1999 at 05:26:24, Bernhard Bauer wrote: >> >> >> >>>The law "a null move program cannot do this simply doesn't exist". >>> >>>The question is: How do you implement the null move technique. >>>And if you do it wrong, it remains a bug. >> >>Fritz5(16 bit) can also solve it and it is a null mover. >> >>I believe that the reason that fritz5.32 cannot solve it is simply that >>Fritz5.32 is weaker than Fritz5(16 bit) >> (snip) > >I believe that fritz5.32 is a buggy program and the bugs influence more >significantly at slower time control. > >Uri I verified for myself that Fritz 5.16, working in the Nimzo 99 interface, solves the problem in question instantly (60 min./G, 44 M hashtable). I'll take everybody's word for it that Fritz 5.32 cannot. I seem to remember, though, that some time ago (6 months?, a year?) a position was posted here, another mate in 2 involving a null move, that the original Fritz 5 could not solve in a reasonable amount of time. When the Fritz 4 engine was loaded, however, it had no trouble. I regret that I didn't note the position, but perhaps someone else remembers, and can supply it. Marc
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