The latest CCRL update (31st August 2025)

[Graham Banks]

The latest CCRL Rating Lists and Statistics (31st August) are available for viewing from the following links:

www.computerchess.org.uk/ccrl/4040 (40/15 and 15m+10s)
www.computerchess.org.uk/ccrl/404 (BLITZ 2m+1s)
www.computerchess.org.uk/ccrl/402.archive/ (BLITZ 40/2 Archive)
www.computerchess.org.uk/ccrl/404FRC (FRC 40/2)
www.computerchess.org.uk/ccrl/Chess324/ (Chess324)

Our 40 moves in 15 minutes repeating (including 15 minutes with 10 second increments) and 2 minutes with 1 second increments are both adjusted to the Intel i7 4770k (3.5GHz) using the Stockfish 10 64-bit benchmark.
All of our current testing uses AVX2 compiles where available.

Be aware that in the early stages of testing, an engine's rating can often fluctuate a lot.

It is strongly advised to 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.

The inclusion or exclusion of engines in our lists should not be taken as our group making a statement about their legality or status. Where there is controversy, it is usually mentioned in the engine notes.

Thanks to:
- Kirill Kryukov who wrote the scripts that produce all CCRL data, with recent processing speed-ups from Martin Sedlak (Cheng author).
- all of our currently active testers (Graham, Gabor, Basti, Shaun, Andres and Matt).
- Ray Banks who ran the time-consuming weekly updates for a very long time, a task now shared among three testers.
- Jay Honnold for both the tournament viewer and for hosting Graham's live broadcasts.
- Jonathan Gilchrist for the utility CCRL notifier, which alerts engine authors when their engine is playing in a live broadcast.
- Anton Mihailov (Chessdom.com) for hosting our rating lists for many years.
- Sam Roelants (Simbelmyne author) who has taken over the hosting of our rating lists.
- all engine authors. Without you, CCRL wouldn't exist.

40/15 and 15m+10s testing this week will include (thanks to Graham, Andres and Shaun. Live broadcast given where applicable):

Live broadcasts of some Gauntlets can be made available upon request.
(Web based viewer courtesy of Jay Honnold, with additions by Lana (Princhess), Jost Triller (Nalwald) and Finn Eggers (Koivisto).

120th Amateur Series Division 7 (finishing Tuesday) Web based viewer http://ccrl.live/16072
120th Amateur Series Division 8 (finishing Wednesday) Web based viewer http://ccrl.live/16067
120th Amateur Series Division 9 (finishing Thursday) Web based viewer http://ccrl.live/16064
120th Amateur Series Division 10 (starting Tuesday) Web based viewer http://ccrl.live/16013
120th Amateur Series Division 11 (starting Wednesday) Web based viewer http://ccrl.live/16064
120th Amateur Series Division 12 (starting Thursday) Web based viewer http://ccrl.live/16072
August Ambush Tournament (continuing) Web based viewer http://ccrl.live/16013

Caissa 1.23 64-bit 4CPU Gauntlet (continuing) Web based viewer http://ccrl.live/16061
Astra 6.1.1 64-bit 4CPU Gauntlet (continuing) Web based viewer http://ccrl.live/16062
Tarnished 4.0-Consort 64-bit 4CPU Gauntlet (continuing) Web based viewer http://ccrl.live/16063

Alexandria 8.1.2 64-bit (continuing)
Oxide 2.0.0 64-bit Gauntlet (finishing Wednesday)
Yakka 1.3 64-bit Gauntlet (finishing Wednesday)
Cinder 0.3.1 64-bit Gauntlet (finishing Thursday)
Tarnished 4.0-Consort 64-bit Gauntlet (finishing Friday)
Reckless 0.8.0 64-bit Gauntlet (starting Wednesday)
Caissa 1.23 64-bit Gauntlet (starting Wednesday)
Clover 9.0 64-bit Gauntlet (starting Thursday)
Viridithas 18.0.0 64-bit Gauntlet (starting Friday)

Various 1CPU and 4CPU Gauntlets being run by Andres.

2m+1s testing since the last update report has included (thanks to Gabor and Shaun):

Yakka 1.3 64-bit
Cinder 0.3.1 64-bit
Emerald 0.4.0 64-bit
Alexandria 8.1.0 64-bit
Pounce 1.2.4 64-bit
Juggernaut 1.10 64-bit
Caissa 1.23 64-bit
Belofte 2.1.9 64-bit
Weiawaga 6.0 64-bit
Petrel 1.0 64-bit
Radiance 4.1 64-bit
Eubos 4.1 64-bit

FRC 40/2 testing since the last update report has included (thanks to Basti):

Clover 9.0 64-bit (in progress)
Tarnished 4.0-Consort 64-bit (in progress)

Chess324 (thanks to Basti)

Quanticade Orion 2.0 64-bit (in progress)

DFRC 40/2 testing (thanks to Basti and Matt):

On hold for now.