CCRL update (19th October 2007)

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Graham Banks
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Joined: Mon Sep 10, 2007 4:38 am

CCRL update (19th October 2007)

Post by Graham Banks »

The October 19th update of the CCRL Rating Lists and Statistics is now available for viewing at:
http://www.computerchess.org.uk/ccrl/4040/

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 while our current blitz testing is at both 40 moves in 4 minutes repeating and 40 moves in 12 minutes repeating, all adjusted to the AMD64 X2 4600+ (2.4GHz).

Currently active testers in our team are:
Graham Banks, Ray Banks, Shaun Brewer, Kirill Kryukov, Dom Leste, Tom Logan, Andreas Schwartmann, Charles Smith, George Speight, Chris Taylor, Chuck Wilson, Gabor Szots and Martin Thoresen.

A big thanks to all testers as usual for their efforts this week.


40/40 Notes

There currently 81,256 games in our 40/40 database.

Many engines on our list have few games and in many cases their ratings are likely to fluctuate (markedly for some) until a lot more games are played. Therefore no conclusions should be drawn about their strength yet.
To illustrate this point, when an engine has 200 games played, the error margin is still approximately +-40 ELO, after 500 games +-25 ELO, after 1000 games +-17 ELO and even after 2000 games there is a +-13 ELO error margin!
This of course highlights the importance of looking at other rating lists that are also available in order to draw comparisons and get a more accurate overall picture.


4CPU 64-bit Engines

Rybka 2.3.2a is over 50 ELO stronger than Zappa Mexico.

There is a similar gap back to Naum 2.2 and Hiarcs 11.1, which are in third and fourth spots respectively.

The remaining well tested engines in this category in order of strength are Loop M1-T, Deep Shredder 10, Deep Fritz 10, Deep Junior 10 and Glaurung 1.2.1.

Testing of Deep Sjeng 2.7 is now underway.


2CPU Engines

Some of the engines here are in the process of getting further games, but the order of strength is almost identical to that described in the 4CPU notes.


Single CPU Engines

As expected, Rybka 2.3.2a leads the ratings here by a big margin over Zappa Mexico which is in second spot.
The 64-bit version of Rybka 2.3.2a seems to have a good edge over the 32-bit version.

Loop M1-T, Naum 2.2, Hiarcs 11.1, Toga II 1.3.1 and Fruit 051103 all appear to be close in strength, with Fritz 10 and Shredder 10 not too far behind.

Strelka 1.8, Spike 1.2 Turin, Deep Sjeng 2.7 and Junior 10 are the next group of engines.
According to our testing.

Ktulu 8.0, Glaurung 2 epsilon/5 and Chess Tiger 2007.1 are 40-50 ELO further back.

We have only just started testing Delfi 5.2.


Free Single CPU Engines

Rybka 1.0 is still the top free engine ahead of Toga II 1.3.1 and Fruit 051103.

Strelka 1.8 and Spike 1.2 Turin come in next, well ahead of Glaurung 2 epsilon/5 and Naum 2.0 which are likewise well ahead of Scorpio 1.91.

Alaric 707, Movei 0.08.438, SlowChess Blitz WV2.1, Zappa 1.1, WildCat 7, Pro Deo 1.2 and List 512 are within a 30 ELO point range of each other.

We have only just started testing Delfi 5.2.

We test a very extensive range of amateur engines through our Amateur Championship divisions (32-bit 1CPU) plus other 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

There are currently 187,092 games in our 40/4 database.

The 40/4 update is usually done separately to our 40/40 update.
The latest ratings can be found here:
http://computerchess.org.uk/ccrl/404.live/

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


FRC Notes

There are currently 20,600 games in the FRC 40/4 database.

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.

Although Rybka 2.3.2 FRC tops the list, it is a private engine, therefore Hiarcs 11.1 is still the best available FRC engine.

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


Stats/Presentation Notes

The LOS stats to the right hand side of each rating list are "likelihood of superiority" stats. They 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, accessible through the link given at the top of this post.

All games are available for download through the link given at the top of this post. They can be downloaded by engine or by month.
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.
Clicking on an engine name now also gives you a ratings history graph for that engine over time (a bit further down the page). The green line is the actual rating. The red lines are the upper and lower error bars, and the blue line represents the number of games.

Custom lists of engines can be selected for comparison.

An openings report page (link at bottom of index 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.
Games can now be downloaded by ECO code.
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