Author: Antonio Dieguez
Date: 16:30:52 12/31/02
Go up one level in this thread
On December 31, 2002 at 19:22:26, Uri Blass wrote: >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 yes. > or maybe you say that you the first 4 >are like Ed as "exactly those 4 killers suggest. I don't understand this but surely not. >>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? yes. >>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. I though the hash was something apart. And as I see in Ed's page, he has it apart too, with 127 points. About my implementation, at least for Amyan i have it well tested and changing only one detail doesn't make it better. And it worked definitely better than using 3 killers of current ply (I used 3 killers for a long time and tried various combinations, altough always for the same ply)
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