TCEC VSOB 21, CCC Blitz 2021 : Both Underway

What's new since the previous post about the world's two most visible, ongoing, engine vs. engine chess events, TCEC Stockfish Wins S21; CCC Romance Continues (August 2021)? Before I answer that question, let's have a summary of that previous post:-

TCEC: Stockfish beat LCZero in the S21 Sufi by a score of +19-7=74 (56.0-44.0). After the Sufi, the TCEC ran a series of bonus matches and is currently running a three-engine 'VVLTC Bonus'. • CCC: The site continues to run thematic events based on romantic openings: two dubious openings in two weeks.

The report on the current situation will be almost as short as that summary.

TCEC: After the 'VVLTC Bonus', the site ran an event called 'LCZeroCPU vs DivP'. Translating one level of jargon, that means the CPU version of LCZero, which normally runs on GPUs, against the engines that competed in the S21 Premier Division, the qualifying event for the S21 Sufi. To translate the next level of jargon -- CPU, GPU, S21, Sufi -- you're on your own. Seven of the eight DivP engines competed; missing was AllieStein. LCZeroCPU lost all but one of the eight-game mini-matches, achieving +2-1=5 against Ethereal.

The site is currently running 'S21 - Viewer Submitted Openings Bonus', aka 'VSOB 21'. The schedule says it will run for at least another month. For my previous post on the subject, see VSOB 20; ECO_FULL (May 2021).

CCC: The site is currently running 'CCC Blitz Championship 2021'. This is the first serious event since I reported on TCEC FRC3, CCC Rapid 2021 : Both Finals Underway (March 2021). The 'Info' tab for the event lists the 16 engines participating followed by the rules for the 'CCC Rapid 2021' event. Maybe I'll learn more for the next post, but the odds are not in my favor.

[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]