Author: Robert Hyatt
Date: 09:18:30 03/18/04
Go up one level in this thread
On March 17, 2004 at 21:19:45, James Swafford wrote: >Just what is a good eval worth? > >I ran Crafty on an AMD XP 2000+ (about 1.5 ghz) on ICC with a stripped >down eval, then with it's regular eval to find out. Check out the >summaries below (the top one is for stripped eval, of course). > >By "stripped down", I mean that the eval counted only material, some >very crude pawn heuristics (doubled pawn, passed pawn, isolated >pawn), and used pawn and knight piece square tables. That's it. > >I'm a bit surprised that the difference isn't a bit more; it's >less than 200 points for blitz and bullet. I strongly suspect >the difference would've been much greater for standard games, >but I have no data to support that. > >Anyone done similar tests? > If you don;t restrict ratings, this isn't as revealing. IE against a 1800 player, tactics will rule the day, regardless of the evaluation. So stripping ot parts of the eval won't make a lot of difference. But against a GM, it will do horribly with no eval... > > cnt | avg | avg | base_secs | inc_secs | >description >-----+-----------------------+-----------------------+-----------+----------+------------- > 271 | 2313.6531365313653137 | 1731.1623616236162362 | 120 | 1 | Br > 2 | 2431.0000000000000000 | 1031.0000000000000000 | 300 | 3 | bu > 673 | 2409.4680534918276374 | 1654.3239227340267459 | 300 | 3 | br >(3 rows) > > cnt | avg | avg | base_secs | inc_secs | >description >-----+-----------------------+-----------------------+-----------+----------+------------- > 246 | 2476.1422764227642276 | 1644.9471544715447154 | 120 | 1 | Br > 2 | 2436.0000000000000000 | 1845.0000000000000000 | 120 | 1 | Bu > 567 | 2583.1869488536155203 | 1653.4673721340388007 | 300 | 3 | br > > >-- >James
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