Stockfish Wins TCEC DFRC2; CCC20 Bullet Underway

In this continuing, fortnightly series on the world's top two engine vs. engine competitions, the previous post was TCEC FRC6, CCC20 Rapid; Stockfish Wins Both (June 2023). Expanding that title produces the following summary:-

TCEC: In the 'S24 FRC6 Final', Stockfish beat LCZero +15-12=23. The site then organized 'S24 DFRC2', which has reached 'League 1', the third of four stages. • CCC: In the 'CCC20 Rapid Finals', Stockfish crushed Lc0 143.0-107.0, then crushed the Mystery engine 67.0-33.0 in an exhibition match. The site then launched the 'CCC20 Bullet Entry League'.

Fast forward two weeks and the current situation looks like this...

TCEC: Stockfish beat LCZero +10-7=33 in the 'S24 DFRC2 Final'. This was the final event for TCEC season 24 (S24). The plans for S25 announce,

Now !Swiss5; then !1day, Cup 12, !1day, Leagues, !1day, !FRD1, !1day, !S26; (current plan, can change, also !r-mobility (armageddon) demo or bonus might be inserted somewhere); !1day per move bonus done in alternate and parallel with other tournaments (ongoing)

What's FRD? The !Command says,

Fischer Random Double event, combining FRC and DFRC in one event: FRC in early part, DFRC for later and final parts.

This is a new form of engine competition. It's unclear what issue it is trying to resolve.

CCC: In the 'CCC20 Bullet' tournment, the 'Entry League' was followed by 'Qualifier 1' and 'Qualifier 2'. Before launching the 'CCC20 Bullet Main' event, the site is conducting a match between Dragon and the Mystery engine.

Given that the sequence for both CCC19 and CCC20 was Blitz, Rapid, Bullet, we can expect that the next event will be 'CCC21 Blitz'. Bold prediction: Stockfish will win both 'CCC20 Bullet' and 'CCC21 Blitz'. Timid prediction: Stockfish will win both 'CCC20 Bullet' and 'CCC21 Blitz'.

...According to my first summary of engine vs. engine events, TCEC/CCC 2019 Q1-Q3 Summary (October 2019), I've been doing this series of posts since January 2019. Back then I was following TCEC S14 and CCC03.

What goes around doesn't always come around. Sometimes it stops. The TCEC is starting S25; the CCC is coming to the end of CCC20. I'm almost certain this current post will be the last in the series on this blog.

[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; Dragon = KomodoDragon]