Author: martin fierz
Date: 01:21:45 08/03/04
Go up one level in this thread
On August 03, 2004 at 04:20:00, martin fierz wrote: >On August 02, 2004 at 16:22:14, Gian-Carlo Pascutto wrote: > >>On August 02, 2004 at 16:12:46, Uri Blass wrote: >> >>>On August 02, 2004 at 16:04:14, Gian-Carlo Pascutto wrote: >>> >>>>On August 02, 2004 at 16:01:14, Cesar Contreras wrote: >>>> >>>>>Hi >>>>> >>>>>I'm getting better result's (about 8% margin) ordering capture moves based only >>>>>on victim value (ignoring attacker value), i think i'm doing something grong. >>>>> >>>>>My question is: it's significatly better MVV\LVA over MVV >>>>> >>>>>I know both are aproximations, but witch one it's statically better. >>>>> >>>>>Thanks in advance. >>>> >>>>Did you use attacker values instead of attacker *indexes*? >>>> >>>>It's a common mistake and I can't think of anything else that would cause what >>>>you're seeing. >>>> >>>>-- >>>>GCP >>> >>>I am afraid that I have no attacker indexes in my code so I do not understand >>>what you are talking about. >>> >>>I have piece list but it is only an array like bishops[10][2] that gives me the >>>squares of the bishops in the board(no more than 10 bishops per side). >> >> MVV/LVA value MVV/LVA index >>Pawn 100 1 >>Bishop 300 2 >>Knight 300 2 >>Rook 500 3 >>Queen 900 4 >> >>Sortvalue = Victimvalue - Attackerindex >> >>-- >>GCP > >i don't understand this - are the victimvalues 1 for a pawn or 100? and anyway, >why does this attackerindex thing work better than using attackervalues? i used >to use MVV/LVA with values in my program before switching to a SEE and it seemed >to work quite well (or my SEE is crap, that is another possibility...) > >cheers > martin ah, i just read your answer above - sorry for asking a second time... hmm, i'll have to try this! any idea how much better your "correct" MVV/LVA is compared to the value comparison? cheers martin
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