Author: Dave Gomboc
Date: 21:31:03 08/10/99
Go up one level in this thread
On August 11, 1999 at 00:22:20, Robert Hyatt wrote: >On August 11, 1999 at 00:04:42, Ratko V Tomic wrote: > >> > So if searching one extra ply discovers something interesting, >> > then =Q will get played. If searching one extra ply discovers >> > something bad, then we avoid seeing the 'bad' by playing =R. >> >> >>That lack of common sense in the programs is typical. What is >>needed is some kind of causal reasoning i.e. it should somehow >>figure out that the "bad" thing <b>isn't caused by the extra >>mobility</b> of the Queen relative to Rook. For example, once it >>is about to pick =R, it should follow through the opponent's >>moves it found for =Q (where it ran into something bad; it >>doesn't matter that it isn't check for =R, opponent can still play >>whatever it did to get out of the check in =Q line). In most cases >>the result will be worse in the "=R" variation. > > >You are misunderstanding.... it is _not_ a mobility issue. Because at the >next ply, the best move is to take the promoted piece, no matter what it is. >But if the promotion is a check, that drives the entire line one ply deeper >than it if is not... ... which implies another reason that it's better to search the promotion to queen first? (Namely, that a re-search to a deeper depth due to a check extension won't be necessary.) Dave
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.