The latest CCRL update (27th June 2025)

[Graham Banks]

The latest CCRL Rating Lists and Statistics (27th June) 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).

119th Amateur Series Division 1 (finishing Tuesday) Web based viewer http://ccrl.live/16068
119th Amateur Series Division 2 (finishing Thursday) Web based viewer http://ccrl.live/16072
119th Amateur Series Division 3 (finishing Friday) Web based viewer http://ccrl.live/16065
119th Amateur Series Division 4 (starting Tuesday) Broadcast link to be advised
119th Amateur Series Division 5 (starting Thursday) Broadcast link to be advised
119th Amateur Series Division 6 (starting Friday) Broadcast link to be advised
Deadly Scratches Tournament (finishing Wednesday) Web based viewer http://ccrl.live/16066
New tournament (starting Wednesday) Broadcast link to be advised

Winter 4.0 64-bit 4CPU Gauntlet (finishing Monday) Web based viewer http://ccrl.live/16061
Stormphrax 7.0.0 64-bit 4CPU Gauntlet (continuing) Web based viewer http://ccrl.live/16062
pawnocchio 1.7.2 64-bit 4CPU Gauntlet (continuing) Web based viewer http://ccrl.live/16063
Halogen 13 64-bit 4CPU Gauntlet (starting Monday) Web based viewer http://ccrl.live/16061

Stormphrax 7.0.0 64-bit Gauntlet (continuing)
Motor 0.9.0 64-bit Gauntlet (finishing Tuesday)
Zangdar 4.04 64-bit Gauntlet (finishing Tuesday)
Astra 5.2 64-bit Gauntlet (finishing Tuesday)
Calvin 6.1.1 64-bit Gauntlet (finishing Friday)
Halogen 13 64-bit Gauntlet (starting Tuesday)
RukChess 4.1.0 64-bit Gauntlet (starting Tuesday)
JackyChess 25.04 64-bit Gauntlet (starting Tuesday)
Cinder 0.2.0 64-bit Gauntlet (starting Friday)

Various 1CPU and 4CPU Gauntlets being run by Andres, who is submitting 4-5 gauntlets each week.

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

Admete 1.8.0 64-bit
Zangdar 4.04 64-bit
Meltdown 1.8 64-bit
Emerald 0.3.0 64-bit
Lunar 0.2.1 64-bit
Juggernaut 1.00 64-bit
Horsie 1.1.0 64-bit
Freda 1.1 64.bit
PZChessBot 2.0 64-bit
Celeris 0.0.1 64-bit
Maelstrom 2.0.0 64-bit

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

Colossus 2005b 64-bit (in progress)

Chess324 (thanks to Basti)

Stockfish 17.1 64-bit (completed)