Author: Ed Schröder
Date: 09:56:58 08/12/04
Go up one level in this thread
On August 12, 2004 at 12:42:56, Albert Silver wrote: > >>>Thanks again, and interesting. You mentioned in the descriptions the various >>>advantages of higher settings for some of the parameters, notably the Chess >>>Knowledge. Aside from the King Safety, I take it that you now believe the >>>default values are still best. >> >>Yes. >> >>Although Thorsten will strongly protest :) >> >> >> >>>A number of the settings aren't clear to me all the same. At least the >>>differences between them. There are a number of parameters linked to attacking, >>>such as Attack, King Safety, and Attractiveness. The difference between them is >>>very unclear to me. >> >>[Attacking = xxx] is meant to be the successor of [Anti-GM = xxx] but since I >>don't compete any longer against GM's I have no idea how it would perform. The >>function searches for complexity on the board. >> >>[Attractiveness = 125] simply is a multiplier of all positional components of a >>position. A value of 125 will multiply the evaluation with 1.25 > >This merely multiplies the values of the components (presumably only those that >apply)? Sounds like an odd idea. Basically it would only serve to exacerbate the >relative importance of the elements, no? I mean for example: > >Attractiveness = 100: > >Passed pawn = 0.30 >Doubled pawns = 0.20 >knight on outpost on f5 = 0.16 > >and if the attractiveness is increased to 150: > >Passed pawn = 0.45 >doubled pawns = 0.30 >Knight on outpost = 0.24 > >In other words it will favor pushing the passed pawn as it increases in value >more than others. Much more than it would normally. Does this really help at >all? If the values are off then they should be readjusted, but here it seems it >will distort the overall picture, serving to solve some positions quicker at the >cost of messing up more of the others. > > Albert The function is (was) useful for me to test (pawn) sacrifices. You will also notice that increasing the value (101-130) will result in more attractive play without losing much strength. Ed
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