TCEC S19 Sufi 75% Finished; CCC15 Still Halted

Two weeks have passed since our last look at the world's foremost engine vs. engine competitions. Although the title of that post, TCEC S19 Preparing Sufi; CCC15 Still Halted (September 2020), told the whole story, let's start with the usual summary.

TCEC: In Premier Division (DivP), Stockfish and LCZero finished 1st/2nd to qualify into the S19 Superfinal. • CCC: There is no news on the technical problems affecting the GPU engines.

The keywords in the title of that post -- TCEC Sufi & CCC Halted -- are just as relevant for this current post.

TCEC: After 75 games of the 100 game match, Stockfish leads LCZero by +11-7=57. Extrapolating to 100 games gives a final score of +15-9=76. The most recent 25 games went +6-3=16 for Stockfish. For the record, the full names of the two engines are:-

• Stockfish 202009282242_nn-baeb9ef2d183
• LCZero v0.26.3-rc1_T60.SV.JH.92-190

In a future post, I'll try to parse those names.

CCC: There is still no news on the technical problems affecting the GPU engines, which I first reported four weeks ago. The report from two weeks ago mentioned the site was running matches for 'CCRL Ratings Standardization'. Now it is running 'CCRL Calibration'.

Last year the site also ran into technical problems, which I reported in TCEC S16 L1; CCC10 GPU Blues Continue (August 2019). It took about three weeks to resolve those problems.

[For further information from the various stakeholders in the engine-to-engine events, see the tab 'TCEC/CCC Links' at the top of this page. • NB: Leela = LC0 = LCzero]