Discussion of anything and everything relating to chess playing software and machines.
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MikeB
Posts: 4889Joined: Thu Mar 09, 2006 6:34 amLocation: Pen Argyl, Pennsylvania
Post by MikeB Wed Feb 01, 2017 6:08 am
jdart wrote: Arasan 20.0 is available from
http://www.arasanchess.org .
Changes in Arasan 20.0:
1) Fix to handling of UCI_LimitStrength and UCI_Elo options. These can now be processed in either order and will set the search strength correctly.
2) Revised tuning program. Only the "Texel" method is supported now. Tuner uses a "mean-squared error" objective and takes a labeled EPD file
as input. Various optimization methods can be selected. Optimization steps are scaled appropriately based on parameter ranges.
3) Changes to king cover and king safety scoring.
4) Bug fix: Ensure hash move is always checked for validity (was not being done for evasions).
5) Fix possible race condition updating root PV.
6) Add some utility programs and Python scripts to source package.
7) Considerable code cleanup and fixing warnings and possible bugs, notably in Syzygy tb code.
This version scores quite a bit better than 19.2 against a gauntlet of opponents in my fast time-control testing, but actually did not win a 2400 game blitz match directly against version 19.2. So I don't know quite what to make of that. Anyway I am releasing it, partly because of the bug fixes, and hopefully more testing will make clearer what the relative strength is.
--Jon
Looks pretty good to me:
Very unscientific match below, since I also let them use their own book and of course not very many games.
Code: Select all
32 rounds and 96 games completed...
time control: 1500+25
Date: 02/01/17 : 00:03:34
96 game(s) loaded
Rank Name Rating Δ + - # Σ Σ% W L D W% =% OppR
---------------------------------------------------------------------------------------------------------
1 Arasan 20.0 3171 0.0 43 43 64 42.0 65.6 30 10 24 46.9 37.5 3064
2 Crafty-25.2 3083 88.0 43 43 64 29.5 46.1 17 22 25 26.6 39.1 3108
3 EXchess v7.96b 3046 37.7 43 43 64 24.5 38.3 13 28 23 20.3 35.9 3127
---------------------------------------------------------------------------------------------------------
Werner
Posts: 2872Joined: Wed Mar 08, 2006 10:09 pmLocation: GermanyFull name: Werner Schüle
Post by Werner Wed Feb 01, 2017 1:46 pm
Thanks Jon,
jdart
Posts: 4367Joined: Fri Mar 10, 2006 5:23 amLocation: http://www.arasanchess.org
Post by jdart Wed Feb 01, 2017 3:56 pm
The way I have implemented it, if there is a hit at the root, the engine is allowed to search but the search moves are restricted to the set that will preserve the best value found from the tablebases.
Werner
Posts: 2872Joined: Wed Mar 08, 2006 10:09 pmLocation: GermanyFull name: Werner Schüle
Post by Werner Thu Feb 02, 2017 1:21 pm
It will be not easy to catch version 19.2:
Werner
jdart
Posts: 4367Joined: Fri Mar 10, 2006 5:23 amLocation: http://www.arasanchess.org
Post by jdart Fri Feb 03, 2017 4:04 am
Blitz gauntlet shows them pretty close:
Code: Select all
Rank Name Elo + - games score oppo. draws
1 Texel-1.05 2512 18 18 600 59% 2455 40%
2 Arasan 19.2 2455 10 10 2400 60% 2386 36%
3 Crafty-25.2 2387 19 19 600 40% 2455 37%
4 Gaviota-1.0 2338 19 19 600 32% 2455 36%
5 Toga-3.0 2308 20 20 600 29% 2455 30%
Rank Name Elo + - games score oppo. draws
1 Texel-1.05 2516 19 18 600 59% 2457 42%
2 Arasan 20.0 2457 10 10 2400 61% 2386 37%
3 Crafty-25.2 2375 19 19 600 37% 2457 38%
4 Gaviota-1.0 2333 19 19 600 32% 2457 34%
5 Toga-3.0 2318 19 20 600 29% 2457 36%
Adam Hair
Posts: 3226Joined: Wed May 06, 2009 10:31 pmLocation: Fuquay-Varina, North Carolina
Post by Adam Hair Fri Feb 03, 2017 10:42 am
So far, 20.0 is ahead of 19.2 @ 40/4 against a gauntlet of opponents (the opponents played are not identical)
CCRL 40/4 computed with Ordo:
Code: Select all
# PLAYER : RATING POINTS PLAYED (%)
225 Arasan 20.0 64-bit : 2993.1 830.0 1381 60
241 Arasan 19.2 64-bit : 2981.0 561.0 1150 49
Meanwhile, self testing shows 19.2 ahead of 20.0 @40/4 at the moment:
Code: Select all
# PLAYER : RATING ERROR POINTS PLAYED (%)
1 Arasan 19.2 : 0.0 ---- 367.5 697 53
2 Arasan 20.0 : -20.1 22.6 329.5 697 47
Sylwy
Posts: 4468Joined: Fri Apr 21, 2006 4:19 pmLocation: IASI - the historical capital of MOLDOVAFull name: SilvianR
Post by Sylwy Wed Feb 15, 2017 9:30 pm
