Author: Uri Blass
Date: 22:50:34 04/20/02
Go up one level in this thread
On April 21, 2002 at 00:12:02, Christophe Theron wrote: >On April 20, 2002 at 12:35:04, Uri Blass wrote: > >>On April 20, 2002 at 11:53:46, Christophe Theron wrote: >> >>>On April 20, 2002 at 03:01:01, Peter Berger wrote: >>> >>>>On April 20, 2002 at 00:29:10, Uri Blass wrote: >>>> >>>>>The fact that tiger did no progress in the last moves is not a good reason to >>>>>afjudicate it as a draw. >>>>> >>>>>Tiger has KRN vs K and the game should continue. >>>>> >>>>>Maybe tiger does not know to win KRN vs K but the 50 move rule are going to >>>>>force it to sacrifice the knight and get KR vs K that it knows to win. >>>>> >>>>>I do not know about the knowledge of palm tiger but it is one possibility. >>>>> >>>>>Uri >>>> >>>>You are completely right and I came to the same conclusion. It was partly a >>>>technical decision as I was really too tired to watch this game any longer. And >>>>I expect exactly the same as you ( the Tiger sacrifices the knight because of >>>>the 50 move rule and then will know how to mate). I think I will let them replay >>>>this endgame (sigh). >>>> >>>>Peter >>> >>> >>> >>>I think that you are right and that the 50 moves rule is going to save Tiger >>>here. >>> >>>As I told you in email, there is a bug in version 14.9. Tiger thinks this KRN/K >>>endgame is actually a KRN/KR. So it uses the wrong knowledge here because of >>>this bug and is not trying to push the king to the border to mate it. >> >>I do not understand it because even in KRN vs KR it is better for the stronger >>side to reduce the distance between the kings and palm tiger did not do an >>effort to do it(even if you use only piece square table evaluation then >>centralizing the king should give better moves than the moves that I saw). >> >>Uri > > > >Tiger just consider KRN/KR as very drawish, and has no specific knowledge apart >from that. > >I wonder if you can win KRN/KR in comp vs comp games, in the general case. I >don't think so, so I did not spend much time on it. It is usually a draw but the same rules that are good for KRB vs KR or KQ vs KR are also good for KRN vs KR so I do not think there is a need for a special code. Usually there is not a win but in positions that there is a win the winner usually put the king in a better square. If I remember correctly then I rememeber a case when gandalf4.32 lost KR vs KRN agaionst Fritz6 when the sides did not use tablebases so knowing nothing is not good there. Uri
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