Not logged inRybka Chess Community Forum
Up Topic The Rybka Lounge / Computer Chess / Oldies engines evaluation algorithm
- - By rocket (****) Date 2019-06-15 08:40
Were they primarily automated or conceptualized?

Operational definitions

Automated random tweaking of arbitrarily assigned parameters (mobility, pawn structure etc) and thousands of test games (engine vs engine).

Conceptual : material value and piece square tables researched, thought out, and carefully calibrated out of personal preferense and theory.
Parent - - By Uly (Gold) Date 2019-06-15 18:25
Conceptual.

I think Vas was the guy that came up with the idea of random tweaking.
Parent - - By Patricio (***) Date 2019-06-16 02:52
hey Uly, did Vas proposed that after some years of following the 'conceptual' approach?
Parent - By Uly (Gold) Date 2019-06-16 15:18
He didn't propose anything. If I have my story right, it was discovered after someone pretending to be Larry Kaufman got access to private information and leaked it.
Parent - By rocket (****) Date 2019-06-16 10:17
I think it's the opposite in Rybkas case (version 1-2) . It had a very simple evaluation function with lots of automated beta testing, tuning the parameters. Later incarnations added new concepts.
Vas wrote that one of the ways he was able to make the 200 elo leap between Rybka 2.32a and R3 was making it more dynamic. It surprised him how such a simple adjustment catapulted its rating, along with additional refinements in search heuristics
Up Topic The Rybka Lounge / Computer Chess / Oldies engines evaluation algorithm

Powered by mwForum 2.27.4 © 1999-2012 Markus Wichitill