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Date: 12 Apr 2006 21:16:04
From: lentoPastel
Subject: Am I failing at singular extensions?????
with a given time, I can solve almost any problem. But I get to this
page showing examples of the advantages of "singular extensions" (while
searching for what that means) and I feel lost. This kind of problems
are really dificult to me, I would have never played the correct move.
WHY?? can anybody give me a hint in the lines (except the first that I
know from before), and tell me what chess principles (or common sense)
are involved? Thanks!:

http://members.home.nl/matador/strength2.htm

This kind of problems are impossible to me.. WHY!!? (I alredy know I am
a little turd, thanks)





 
Date: 13 Apr 2006 11:23:50
From: lentoPastel
Subject: Re: Am I failing at singular extensions?????

Thanks... I was trying to be funny with the s.e. thing :)



 
Date: 13 Apr 2006 10:22:06
From: David Richerby
Subject: Re: Am I failing at singular extensions?????
lentoPastel <[email protected] > wrote:
> with a given time, I can solve almost any problem. But I get to this
> page showing examples of the advantages of "singular extensions"
> (while searching for what that means) and I feel lost. This kind of
> problems are really dificult to me, I would have never played the
> correct move.

I think you might be a little confused. `Singular extensions' is a
technique in the implementation computer search algorithms and not
something that a human would explicitly use when solving a chess
problem.

The idea is that, if one move looks much better than the rest, you
search a little further in the tree for that move just to check that
it wasn't a trap. It's the sort of thing that humans do naturally and
adding it to a computer program makes a big difference to its ability
to search certain types of position, as you can see from the
difference in time taken by Rebel XP (no SE) and Rebel 12 (with SE) to
solve the puzzles you linked to.


Dave.

--
David Richerby Simple Sumerian Tool (TM): it's like
www.chiark.greenend.org.uk/~davidr/ a hammer that's really old but it has
no moving parts!