Author: Bruce Moreland
Date: 14:05:04 02/13/00
Go up one level in this thread
On February 13, 2000 at 16:29:51, Jonathan Lee wrote: >If one wants to follow the rules of chess to the fullest, we need 11 more >questions upon making an imaginary setup of a board. >In castling, there could be as many as 4 questions. >In en passant, there could be as many as 7 questions. > >My imaginary setup is: >white king on e1 >black king on e8 >white rooks on a1 and h1 >black rooks on a8 and h8 >white pawns on b5, d5, f5, and h5 >black pawns on a5, c5, e5, and g5 > >White to move first (a question is who to move first in which most programmers >have already done). This position is where maximum number of questions are >asked. (As I said, a total of 11.) > >Another neat thing is to have a question within a question (circular reasoning). >The question is should I have which questions for castling, en passant, and who >to move first. That way there is an option on whether or not to close the >loopholes. > >We are fast approaching 100,000 messages on chess computers and I HOPE THIS IS A >GOOD ONE. Some programmers like Richard Lang still haven't closed the >loopholes. > >I do believe people have their say on mistakes and improvements on chess >computers, but a grandmaster rating seems VERY high to me. >Jonathan (21st message) This post is hard to understand, but it's possible to describe all of the above information in a FEN string. It includes castling privileges and an en-passant target square if necessary. But there is more. Minimally, you need to know how many half-moves have been made since the last capture or pawn move, and a FEN string covers this as well. But a FEN string doesn't do everything you need. In order to fully describe a chess position you need a list of all previous moves from the current position back to the last capture or pawn move, since these positions are used when detecting 3x repetitions. bruce
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.