Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: SEE and pin detection

Author: Kolss

Date: 05:15:42 08/31/04

Go up one level in this thread


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.



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.