CCRL update (9th November 2007)

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

CCRL update (9th November 2007)

Post by Graham Banks »

The November 9th update of the CCRL Rating Lists and Statistics is now available for viewing at:
http://www.computerchess.org.uk/ccrl/4040/

The list gets updated periodically during the week and these updates can be viewed here:
http://www.computerchess.org.uk/ccrl/4040.live/
Please be aware that 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 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 84,740 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.

Deep Shredder 11 lies 40 points further back in third spot.

Naum 2.2 and Hiarcs 11.1 are fourth and fifth strongest respectively in this category.

After 233 games, Deep Fritz 10.1 is at the same level as Hiarcs 11.1 and could well move ahead after further testing.

The remaining well tested engines in order of rating are Loop M1-T, Deep Junior 10, Glaurung 1.2.1 and Deep Sjeng.


2CPU Engines

With the emphasis of multi-cpu testing on 4CPU as opposed to 2CPU, there are still gaps in this category and some of the engines also require further games. However, the order of strength is almost identical to that described in the 4CPU notes, except that we have not yet started testing either Deep Shredder 11 or Deep Sjeng 2.7.
If anybody would like to help us out with 2CPU testing, we would love to hear from you.


Single CPU Engines

Rybka 2.3.2a reigns supreme, almost 150 ELO ahead of Shredder 11 and Zappa Mexico.

Toga II 1.3.1 seems to have a tiny edge over a group of closely matched engines that include Loop M1-T, Hiarcs 11.1, Naum 2.2, Fritz 10 and Fruit 051103.

Strelka 1.8 has the edge over Spike 1.2 Turin, which in turn has an edge over Deep Sjeng 2.7 and Junior 10.

Glaurung 2 epsilon/5, Ktulu 8.0, Bright 0.2b (private) and Chess Tiger 2007.1 are 40-50 ELO further back.
Testing of Scorpio 2.0 is now underway and could well be amongst this group.

Delfi 5.2 seems to be on a par with the top CM settings, SmarThink 1.00, Alaric 707 and Movei 0.08.438.


Free Single CPU Engines

Rybka 1.0 64-bit is still the top free engine ahead of Toga II 1.3.1.

Fruit 051103 and Strelka 1.8 come in third and fourth respectively.

Spike 1.2 Turin in fifth completes the current elite group.

We have only just started testing Scorpio 2.0, but it looks likely to be similar in strength to Glaurung 2 epsilon/5 and Naum 2.0.

Alaric 707, Delfi 5.2, Movei 0.08.438, SlowChess Blitz WV2.1, Zappa 1.1 and WildCat 7 are within a 20 ELO point range of each other.

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 193,414 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 at one of the following links:
http://computerchess.org.uk/ccrl/404/
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 22,600 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.

Shredder 11 has now taken over second spot behind Rybka 2.3.2 FRC (private), an impressive 80 ELO ahead of Hiarcs 11.1 and Naum 2.2.

During the week just gone, Hamsters 0.5 was tested and moved into 13th place, leapfrogging Hermann 2.0.

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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