Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: about using killers in Rebel and about programming

Author: Uri Blass

Date: 16:22:26 12/31/02

Go up one level in this thread


On December 31, 2002 at 18:59:07, Antonio Dieguez wrote:

>On December 31, 2002 at 17:49:52, Uri Blass wrote:
>
>>From Ed programmer stuff
>>
>>Killer-One [current ply]      110
>>Killer-One [current ply-2]    108
>>Killer-Two [current ply]      106
>>Killer-Two [current ply-2]    104
>>
>>I until today used only
>>
>>Killer-One [current ply]
>>Killer-Two [current ply]
>>
>>I am interested to know if using 4 killers is a new idea or maybe this idea is
>>known to be used by other programs.
>
>It is obviusly not a new idea, but a candidate to new idea is using exactly
>those 4 killers, and the exact details of the rest of Rebel ordering.
>
>I use
>
>Killer-One   [current ply]
>Killer-Two   [current ply]
>Killer-Three [current ply]
>Killer-Four  [current ply]
>Killer-One   [current ply+2]

You say that you use ply+2 and not ply-2 or maybe you say that you the first 4
are like Ed as "exactly those 4 killers suggest.
>
>When a killer causes a cut-off it win two places.
>When a killer is the best move (with exact score) it win 3 places.

Do you say that a killer that give something above alpha but not above beta
win 3 places in case that you find nothing better than it?


>
>Also when the recommended move of the hashtable causes inmediate cutoff it win 3
>places.

I thought that every time a move cause cutoff it is considered as the first
killer move for that ply and the question if it is because of hash or because of
other reasons is not relevant.

Uri



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.