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Subject: Re: Search extention

Author: Uri Zlatnik

Date: 15:25:40 12/24/04

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On December 24, 2004 at 14:17:36, Uri Blass wrote:

>On December 24, 2004 at 12:52:55, Pallav Nawani wrote:
>
>>On December 23, 2004 at 14:03:34, Uri Blass wrote:
>>
>>>On December 23, 2004 at 13:12:45, Pallav Nawani wrote:
>>>
>>>>On December 23, 2004 at 06:25:20, Uri Zlatnik wrote:
>>>>
>>>>>How is the search extension of a software improved? Does this have to do with
>>>>>alpha-beta pruning methods?
>>>>
>>>>I am not sure what you mean here, so I'll pass this one.
>>>>
>>>>>For example CM 10th edition (the King engine) has longer search extension than
>>>>>Fritz 8 but it doesn't always find the best move.
>>>>
>>>>Search extensions are mainy good for tactical moves. If a positional move is the
>>>>best one, then evaluation is also of importance. Also, no engine can always find
>>>>the best move!
>>>
>>>The position that Uri Zlatnik posted was only about tactics and not about
>>>positional moves.
>>>
>>>Uri
>>
>>Well, maybe he was talking about some tactical position in some other thread,
>>but I haven't read that one, and he did not specify any position here.
>
>He talked about tactical position in the following thread
>
>http://www.talkchess.com/forums/1/message.html?402041
>
>He claimed that it is a positional problem but when you look at the position it
>is clearly about tactics and not about positional evaluation.
>
>Uri

True the variant is mostly tactical but some basic understanding of the pawn
structures is also required for this.

The problem with chess softwares is that they do not play a move until the full
variant is calculated. The problem is that some variants might even be as long
as 15 moves (30 plies).



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