Author: Vasik Rajlich
Date: 02:58:52 09/01/04
Go up one level in this thread
On August 31, 2004 at 14:33:00, Vincent Lejeune wrote: >On August 31, 2004 at 09:38:25, Vasik Rajlich wrote: > >>On August 31, 2004 at 08:15:42, Kolss wrote: >> >>>On August 31, 2004 at 06:52:10, Vasik Rajlich wrote: >>> >>>>On August 30, 2004 at 19:44:50, Eugene Nalimov wrote: >>>> >>>>>On August 30, 2004 at 14:03:49, Dan Honeycutt wrote: >>>>> >>>>>>In spite of Dr. Hyatt's admonishment that this was a loser in Crafty, I'm bent >>>>>>on trying it. Since I do legal move generation I can do the pins for half price >>>>>>- I either have or can use the pin data for one side in conjunction with >>>>>>generating moves. I just finished the routine. My NPS dropped by just over 4% >>>>>>on bench test psitions. I've just started testing an hope to have some >>>>>>indication if pin detection is a win, lose or draw in a few days. >>>>>> >>>>>>One aside - the pin detection is not always more accurate (or mine isn't). In >>>>>>the following position for the move Nxg5 the no-pin SEE correctly returns +1 >>>>>>where the pin-detection SEE comes back with -2. >>>>>> >>>>>>[D] 7k/4q3/8/6p1/4N3/5N2/8/4K3 w - - >>>>> >>>>> >>>>>White is lost in 24 :-) >>>>> >>>>>Thanks, >>>>>Eugene >>>> >>>>Really? This ending is only lost in exceptional cases - and it's certainly not >>>>obvious that this is one of them. >>>> >>>>Vas >>> >>>Hi Vas, >>> >>>Are you sure? It seems to me that this ending (Q vs. NN) is generally won for >>>the queen. Maybe someone with the TB could check... >>> >>>Best regards - Munjong. >> >>Yes - but there exist some complicated zugzwang positions, even in the middle of >>the board. I guess here black can already force one of them. >> >>Vas > >Could post some NNvsQ draw positions (with no fork in 1 move :o) ), please ? i'm >very interresting in ... If you like these sorts of positions, I'd highly recommend "Secrets of Pawnless Endings" by J. Nunn. He does a good job trying to figure out the themes from the TB results. Of course many times the theme is that you need to count 20 moves ahead ... :) Vas
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