Author: Eugene Nalimov
Date: 21:40:35 01/22/00
Go up one level in this thread
On January 22, 2000 at 23:57:56, Robert Hyatt wrote: >On January 22, 2000 at 22:04:19, Len Eisner wrote: > >>On January 22, 2000 at 20:23:42, Robert Hyatt wrote: >> >>>On January 22, 2000 at 20:19:19, Robert Hyatt wrote: >>> >>> >>>There is another way to handle this that might be better against >>>humans: >>> >>>Do a minimax search to some depth, but probe the tablebases at each ply. >>>Make the static eval return something like N-sum(opponent's non-losing >>>moves). The idea is that you would like to follow branches where the >>>opponent has only one non-losing move at several points, hoping for one >>>blunder to lose the game for him. >>> >>>I had code written for this, but never really finished testing it as the >>>current approach is simpler... >> >>I like it . . . >> >>In playing through 5-piece endings in GM games, I noticed that even GM?s don?t >>always find the single move that draws in those endings where only one move >>holds the game. It is incredibly difficult to find those moves without a >>tablebase. >> >>Len > > >Sometimes yes, sometimes no. IE sometimes the only move is very obvious. >Which is a real problem... ie you _could_ reach a point where you choose >between (a) and (b). (a) has more positions where there is only one move >that holds, but to a human they are very obvious. (b) has fewer positions >that hold, but they are much harder to find. The problem is detecting which >is which. IE which kind of positions are hard for the human to find the one >right move in, and which are easy. > >That isn't something that I think is very easy, yet... Maybe with 6 man OTB things change - i.e. more moves become less obvious? When I'll at last upload KRNKNN and KRBKNN (previous 2 times connection was broken during transfer), you can make more clean experiment - try to let the program to play those against GM. I think that somebody who is specialized on endgames (e.g. Nunn) will be curious to try. That also can amswer the question about 50 moves rule - will human be able to stay for 50 moves when initial position is e.g. "lost in 200". Eugene
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.