Author: Christophe Theron
Date: 08:41:05 11/01/03
Go up one level in this thread
On October 31, 2003 at 17:46:15, Russell Reagan wrote:
>On October 31, 2003 at 17:04:56, Christophe Theron wrote:
>
>>>Richard Lang said that Genius had a "swap off routine" instead of qsearch.
>>
>>
>>
>>In the early versions, yes.
>>
>>Not anymore. Just have a look at the lines it displays.
>>
>>Instead, it has a very sophisticated QSearch.
>
>
>Are you sure?
>
>Richard Lang, August 26 2003:
>
>"For example I have never used capture searches and rely instead on a static
>swap off routine. This has changed little over the years."
>
>http://www.beepworld.de/members37/computerschach/chessgenius.htm
I don't know what vocabulary Richard is using.
I rely on what I see.
Genius' nominal search is 3 plies deeper than the first depth number displayed.
The rest is QSearch.
So when Genius says 6/18, it means (almost) the same as a depth search of 9/18
in other chess programs (most significant lines searched to 9 plies, some lines
searched to 18 plies). I'm pretty sure about that, it's very obvious.
Then Genius' QSearch seems to be 4 plies deep in most cases. I'm not completely
sure about that. Maybe a SEE is used after these 4 plies. Long sequences of
check-check are searched for the remaining 5 plies. So the QSearch part is at
most 9 plies deep.
Christophe
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