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Up Topic Rybka Support & Discussion / Rybka Discussion / Larry Kaufman settings for Rybka 2.3
- - By dr_zied_haddad (**) [fr] Date 2010-06-06 11:25
Can someone tell us those famous piece parameters by Larry Kaufman for the Rybka 2.3 engines?
Thanks
Parent - - By Felix Kling (Gold) [de] Date 2010-06-06 11:37
In that version some extra evaluation algorithms were added, which didn't improve (or slightly weakened) Rybka but seemed reasonable to Larry. So it wasn't about piece values, although they may have been changed, too, for that version.
Parent - - By Vasik Rajlich (Silver) [pl] Date 2010-06-06 12:19
It was different piece values.

Vas
Parent - - By Felix Kling (Gold) [de] Date 2010-06-06 12:24
Aha, so no evaluation changes? Looks like I confused it with Rybka 3 human.
Parent - - By Vasik Rajlich (Silver) [pl] Date 2010-06-06 12:33
Maybe. Rybka 3 human had weight changes throughout the eval, not just piece weights.

Vas
Parent - - By wem511 (**) [us] Date 2010-06-06 14:15
any way to tweak normal rybka, by ourselves to make play more like a human version?
Parent - - By Felix Kling (Gold) [de] Date 2010-06-06 14:36
To quote Larry from the beta test forum:

Here are my final recommendations for Rybka 4 Human version, and how I derived them. Leave pawn and queen unchanged, raise all the minors by 24 cp, and raise the rooks by 12 cp. (...)

So basically you can create some kind of human version with those parameters :)
Parent - By wem511 (**) [us] Date 2010-06-07 03:57
ty vm :)
Parent - By Antares (****) [de] Date 2018-04-23 08:20

> To quote Larry from the beta test forum:


OMG!, so there is where Vas and Larry are still posting daily? :grin:
Parent - By Uly (Gold) [mx] Date 2010-06-07 06:59

> In that version some extra evaluation algorithms were added, which didn't improve (or slightly weakened)


No, actually it became defaults for 2.3.1 and onwards, AFAIK.
Up Topic Rybka Support & Discussion / Rybka Discussion / Larry Kaufman settings for Rybka 2.3

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