Author: Albert Silver
Date: 18:40:53 09/20/04
Go up one level in this thread
On September 20, 2004 at 19:19:21, Nolan Denson wrote:
>I thought i would post this and let you all test these settings. I know a few
>of the options are inactive but when i turned them on i seem to get good
>results. I am some what confuse on what to use not because what i thought was
>active is no longer active. But, here you guys go enjoy.
Well first of all, thanks. My next question would be: where did you get this
list of parameters? Not from the main page at
http://members.home.nl/matador/engine.htm
>[Mobility = 200]
>[Pawn Structure = 100]
>[Passed Pawns = 110]
>[Pins = 150]
>[Bishop Pair = 100]
>[Chess Knowledge = 350]
The biggest problem with this is it slows down the search enormously, so you
really have to see whether the moves it finds through knowledge are compensated
enough by the loss in ply-depth.
>[Center Control = 75] * 25
From 25 to 75? Woah... :-)
I´d make a small suggestion. Take a test suite, and take only one parameter and
see how much the solution times change on 4-5 positions when you change the
value by 10. For example, take the default settings, see how long it takes to
solve the positons, and then merely change the King Safety from 150 to 160 and
time them again. I´m not suggesting this is better than the default, but it
helps show much much even one single change of 10 can make. I keep Excel tables
of the changes to get a feel as to how much they change, and what.
>*** Inactive parameters, to activate change the "?" into "=" and vice versa.
Inactive doesn~t mean they are bad as far as I know. It usually means they
either don´t do anything special, but no harm as far as Ed knows, or they are
being tested still and haven´t been approved yet.
>[King_Safety = 200] * King Safety new style
I´ll be honest with you. I tested this quite a bit and haven´t been able to make
it look good. The older King Safety function has yielded better results for me.
Mind you, anything I say is merely an opinion, not gospel.
>*******************************************************************************
> ***
>*** My added parameters, to activate change the "?" into "=" and vice versa.
> ***
>*** Section SEARCH parameters
> ***
>*******************************************************************************
Are these from Rebel 12 by any chance? ANyhow, more goodies to try. Over at the
SchachComputerWelt forum, Ed passed on a few of these
(http://f50.parsimony.net/forum200336/messages/3353.htm) and one I don´t see on
your list
[Pruning = MISC_30] * extend singular checks
[Pruning = MISC_42] * extend first check too
[Pruning = MISC_47] * King Safety extension
The 3 combined are murder to find tactics. They really do a good job, but...
when I added them to my settings, Pro Deo started acting a bit funny. I think it
could be that with the King Safety extensions it already gets a boost of
adrenaline, and with the much higher KS value I had (175) the poor thing thought
it was Rambo. :-)
I´m trying them with lower King Safety values now...
>[Lazyeval MIDG = strong] * normal|moderate|strong promising
>[Lazyeval ENDG = normal] * normal|moderate|strong
Is this an improvement over Misc_21 ?
>[Pruning = MISC_07] * No recapture extension when capture is just a
>pawn (speedup=13%)
>[Pruning = MISC_17] * skip first extension (speedup=20-25%)
>[Pruning = MISC_65] * research fail-high-error one ply deeper
Now this one I like. I am sick of seeing it find the right move and then reject
it as it fails to see the advantage.
>[Pruning = MISC_44] * New endgame extension
I wonder how this one compares to the one he also gave at the other forum:
[Pruning = MISC_26] * Endgame extensions (under testing mind you)
BTW, please share results of matches or something, as "good results" is vague
and could simply be based one one game that was esthetically pleasing. Peace,
and thanks again.
Albert
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