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Subject: Re: Comparison Chessbase-Winboard strenght

Author: Andreas Herrmann

Date: 07:46:53 07/11/01

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On July 11, 2001 at 10:05:21, Paul De Man wrote:

>Hello,
>
>Here a comparison at 10m+15s/move. 2 tournaments on different computers. The
>conclusion is simple: the strength of the programs is more or less equal on the
>2 interfaces.
>
>Programme	coteWB	466mhz	800mhz	Total	%total	Eloadv PerfCB diff WB-CB
>		       (sur 52)(sur 52)
>
>LG2000v2.9a *1	2511	---	30,5	30,5/52	  59	2432	2497	-14
>LGv3 *1		2511	---	30	30  /52	  58	2432	2489	-22
>Crafty 18.08N	2484	33,5	34,5	68  /104  66	2427	2544	+60
>Yace 0.23	2460	28	30	58  /104  56	2427	2470	+10
>Yace 0.99.01	2460	25,5	36	61,5/104  60	2427	2499	+39
>ZChess 2.22	2454	30,5	---	30,5/52	  58	2421	2478	+24
>Pharaon 2.36c*2 2454	27	30	57  /104  55	2427	2463	+9
>Gromit 3.0	2441	25	21,5	46,5/104  45	2427	2391	-50
>AnMon 5.10	2439	24,5	24	48,5/104  47	2427	2406	-33
>Comet B32N	2432	27	26	53  /104  51	2427	2434	+2
>Amy 0.7		2422	28,5	---	28,5/52	  55	2421	2457	+35
>
>Games on demand.
>
>Paul De Man, Brussels.
>TCB 045 *3	2419	24	19	43  /104  42	2427	2380	-39
>GLC 2.13 *4	2394	28	22	50  /104  48	2427	2413	+19
>Nejmet 2.60	2373	22	20,5	42,5/104  41	2427	2362	-11
>Wildcat 2.55-56	2347	22,5	20,5	43  /104  42	2427	2370	+23
>Tao 42c *5	2320	18	19,5	37,5/104  36	2427	2325	+5
>
>*1: Little Goliath en deux versions; *2:Pharaon est la nouvelle version de
>ZChess; *3:The Crazy Bishop; *4:Green Light Chess; 5:version spéciale de Dann
>Corbit

How have you calibrate the two ratings together? Have you played the same
engines under both GUIS? For excample have you played engine A under Winboard
against engine A under CB. I think this is the only way to calculate the real
differences between 2 GUIS. Normally it's not possible that an Winboard Engine
is stronger under CB. Also the games you have played aren't enough to make good
ratings. In 50 or 100 games the failure can be to high.

To calculate a rating difference between 2 Winboard engines under 2 different
GUIS do the following:
Run Engine A (for excample Crafty) under Winboard on Computer A and the same
Winboard version under CB on a second Computer. Don't use a native version of
Crafty under CB, because it's not the same. Now play 200 or 300 games. This
requires 2 computers with the same hardware.

I have made this with my Engine Holmes, and i was surprised that there was a
very big difference. As far as i know there was a difference of about 80 ELO
weaker under CB.


Andreas




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