17 January 2022

Stockfish Wins Both TCEC FRC4 and CCC16 Bullet Events

Two weeks ago, in the previous post on the two foremost, ongoing, engine vs. engine competitions, TCEC FRC4 Semifinals, CCC16 Bullet Finals : Both Underway (January 2022), both tournaments were close to declaring a winner. Here's a summary of that post:-

TCEC: The FRC4 'Final League' is currently underway. Stockfish is leading at the halfway point, but the point spreads separating the top three engines are close. The top two engines qualify into the Final. • CCC: Stockfish and Dragon qualified from the 'CCC 16 Bullet Semifinals' into the Final. Stockfish holds a commanding lead and is close to clinching the event.

The outcome of those events is the subject of this week's post.

TCEC: Stockfish and LCZero tied for 1st/2nd in the FRC4 'Final League', a point ahead of KomodoDragon. Stockfish beat LCZero +13-9=28 in the Final. A note mentioned,

!bookfrc • Final League and the Final will use unbalanced books [...] On the edge between draw and white win.

For more info, see TCEC FRC 4, under 'FRC Book Generation'. On the same page, a note under 'Polls' mentions, 'During League A, 112 lost FRC games from the Season 6 FRC Special Event was found and added to the database.' I couldn't find the lost games, but I didn't look very long.

After FRC4, the site ran an event called 'S22 - DFRC Sanity Check'. What's DFRC?

!dfrc • Double Fischer random chess: The same as Fischer random chess, except the White and Black starting positions do not mirror each other. Double FRC has 921,600 (960*960) possible starting positions.

I should have more to say about 'unbalanced books' and DFRC when I tackle FRC4 on my chess960 blog. The site is currently performing 'S22 - QL L4 L3 Testing', where 'L' stands for 'League'.

CCC: In the 'CCC 16 Bullet Final', Stockfish beat Dragon 988.0-632.0 out of 1620 games. I didn't have time to work out the WLD stats; maybe later. [Later: +480-124=1016; Stockfish won six games w/ Black; Dragon none.]

After the CCC16 Bullet tournament finished, the site ran a 'No Black Castling' bonus event. Like the TCEC DFRC event, this is theoretically interesting and deserves further discussion.

The site is currently running its 'CCC 16 Blitz Main' event with 12 engines, three of which appear to have earned their participation via a qualification event. The 'Info' tabs for both events say, 'top 2 promote to Main', but it's titled 'CCC 16 Rapid Qualification' (not 'Blitz'). Communication has never been the CCC's strong point.

[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]

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