Author: Uri Blass
Date: 10:08:39 02/01/04
Go up one level in this thread
On February 01, 2004 at 12:41:53, Robert Hyatt wrote: >On February 01, 2004 at 07:20:20, Dieter Buerssner wrote: > >>On January 31, 2004 at 22:08:33, Robert Hyatt wrote: >> >>>On January 31, 2004 at 21:37:29, J. Wesley Cleveland wrote: >> >>>>>What do you do with KRPP vs KR positions deep in the tree where you need to >>>>>promote? >>>> >>>>I take the exact value from the KRPP vs KR table and prune. You only need >>>>the KR** vs KR tables if you promote with a capture. >>> >>>How can you do that? How do you know the promoted position is a win or a draw >>>(or even a loss) even though the previous un-promoted position was a win or >>>draw? >> >>You don't need to know it inside the search tree. As Wesley said, you have >>already cut the tree, before you are going to promote. >> >>Regards, >>Dieter > >I don't follow. I reach a krppkr position at the root, and I make the best >move, until there is no winning move except a promotion which I can't see. So >now I do a search, and I _still_ need the tables to make sure I don't promote >wrongly into a draw... > >If you have krpp vs kr, you still reach positions where you will have to search >or else shuffle and draw. And there you need the right tables or you can end up >with =Q and a draw where =N may win... In theory you are right but can you give me an example when without the right tables search tells you to make the wrong promotion and you do not find non promotion move to reduce the distance to mate? Uri
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.