CCRL update (6th June 2008)

[Graham Banks]

The June 6th update of the CCRL Rating Lists and Statistics is now available for viewing at:
http://www.computerchess.org.uk/ccrl/4040/

The list usually gets updated once or twice during the week and these updates can be viewed here:
http://www.computerchess.org.uk/ccrl/4040.live/
However, no game downloads are available from this live link.

The links to the various rating lists can be found just beneath the default Best Versions list.
For example there is a 32-bit Single CPU list.

Our standard testing is at 40 moves in 40 minutes repeating and our blitz testing is at 40 moves in 4 minutes repeating, both adjusted to the AMD64 X2 4600+ (2.4GHz).
We have abandoned our 40/12 testing and the link will be removed when Kirill finds the time to do so.

Currently active testers are:
Graham Banks, Shaun Brewer, Kirill Kryukov, Tom Logan, Charles Smith, George Speight, Chuck Wilson and Gabor Szots.
A few other testers are currently taking a break, but remain on our team.


40/40 Notes

Be aware that in the early stages of testing, an engine's rating can often fluctuate a lot.
It is strongly advised to also look at the many other rating lists available in order to get a more accurate overall picture of an engine's rating relative to others.


4CPU 64-bit Engines

Naum 3.1 edges out Zappa Mexico II for second spot, still 50 elo behind Rybka 2.3.2a.

Toga II 1.4.1SE remains very evenly matched with Deep Shredder 11, a further 50+ elo back.
It will be interesting to see whether Toga II 1.4.3JD beta performs better.

Although more games are still required, there seems very little difference between Hiarcs 12 Sharpen PV On, Hiarcs 12 Default and Hiarcs Paderborn 2007. All are ahead of Deep Fritz 10.1 and Glaurung 2.1.

40 elo further back, Loop M1-T and Bright 0.3a come in next, holding a clear advantage over Deep Junior 10 and Deep Sjeng 2.7 and Scorpio 2.0.


2CPU Engines

With the emphasis of our multi-cpu testing on 4CPU as opposed to 2CPU, there are gaps in this list and some of the engines also require further games.
We would welcome applications from further testers prepared to focus on 2CPU, so that we could present a more worthwhile rating list in this category.
However, in all honesty, the relative ratings of the engines in this category are pretty much the same as in the 4CPU list.


Single CPU Engines

Rybka 2.3.2a has a 70 elo buffer over second placed Naum 3.1 32-bit.

Deep Shredder 11 1CPU has a slight edge over Zappa Mexico II and Fritz 11 in the battle for third spot.

We have started testing Toga II 1.4.1SE with the expectation that it will likely be a little stronger than the impressive Toga II 3.1.2SE.
Hiarcs 12 with its default Sharpen PV Off setting is still ahead of the Sharpen PV On setting.

Next come Loop 13.6 and Fruit 2.3.1, with a comfortable gap between them and the closely grouped Spike 1.2 Turin, Deep Sjeng 2.7, Bright 0.3a, Junior 10 and Thinker 5.1e Passive.
Testing of Glaurung 2.1 is still in the early stages.

There is a good distance back to Ktulu 8.0, Chess Tiger 2007.1 Frenzee Feb08 and SmarThink 1.00.
SmarThink 1.10 Moscow is untested at this stage.

Chessmaster 11, Booot 4.14.0, Movei 00.8.438 (10 10 10), Scorpio 2.0 and Alaric 707 comprise the next group of engines ahead of E.T Chess 13.01.08, SlowChess Blitz WV2.1, Delfi 5.2, Ruffian 2.1.0, WildCat 8, ProDeo 1.6b and Gandalf 6.


Free Single CPU Engines

Toga II 3.1.2SE seems to have the edge over Rybka 1.0 as the top free engine.
It will be interesting to see if Toga II 1.4.1SE can further widen this gap with further testing.

Fruit 2.3.1 is back off the pace, but still comfortably ahead of Spike 1.2 Turin, Bright 0.3a and Thinker 5.1e Passive.
Glaurung 2.1 doesn't have enough games yet to state its likely strength with any certainty.

Naum 2.0 and Frenzee Feb08 are 40+ elo further back.

Booot 4.14.0, Movei 00.8.438 (10 10 10), Scorpio 2.0 and Alaric 707 come in next, ahead of E.T Chess 13.01.08, SlowChess Blitz WV2.1, Zappa 1.1, Delfi 5.2, WildCat 8 and Pro Deo 1.6b.

We test a very extensive range of amateur engines (currently ranging down to the 2000 ELO level) through a range of tournaments, all of which can be followed in our public forum.
Our aim is of course to ensure that all engines lower on our lists get 200+ games.


Blitz Notes

An enormous amount of work goes into the blitz list and it is well worth a visit.

The latest ratings can be found at one of the following links:
http://computerchess.org.uk/ccrl/404/
http://computerchess.org.uk/ccrl/404.live/

Of special interest to some will be the best free 1CPU engines list which is being constructed through a systematic testing approach as mentioned here:
http://kirr.homeunix.org/chess/discussi ... f=7&t=3271


FRC Notes

Ray tests only those engines that can play FRC through the Shredder Classic GUI.
If engine authors have a new and stable version of their engine that will run under this GUI, they should contact Ray if they wish to see it tested.

The top engine, Rybka 2.3.2z3 has remained private, therefore the best three available FRC engines are Shredder 11, Naum 3 and Hiarcs 12.
Ray has not tested Naum 3.1.

For FRC the best list to look at is the pure list.
http://www.computerchess.org.uk/ccrl/404FRC/


Stats/Presentation Notes

The LOS (likelihood of superiority) stats to the right hand side of each rating list tell you the likelihood in percentage terms of each engine being superior to the engine directly below them.

A list of games played this week per engine can be found in the update thread in the CCRL public forum.

All games are available for download by engine, by month or by ECO code.
ELO ratings are now saved in all game databases for those engines that have 200 games or more.

Clicking on an engine name will give details as to opponents played plus homepage links where applicable.

Custom lists of engines can be selected for comparison.

An openings report page lists the number of games played by ECO codes with draw percentage and White win percentage. Clicking on a column heading will sort the list by that column.