Final draw rate was 76%, lower than what Cato predicted though close to the draw rate of the last superfinal. There were 4 black wins, two for each engine.
Game termination
The three most common game termination causes were:
45% - TCEC draw rule
24% - TCEC win rule
19% - TB position
Moves per game
Median=62
Average=70.7
There were 10 100+ move games, two of these were decisive.
Time per game (hours)
Median= 4:04
Average=4:05
The short increment made sure the game duration would not far exceed 4 hours.
Openings
There were variable length book openings in this stage chosen by Jeroen.
The first letter of the ECO codes was distributed as follows:
A small bias for Sicillian openings and open games, probably close to human game opening distribution.
If we use the opening 'family name' (using format FAMILY_NAME: VARIANT....) the top 3 are:
Sicillian - 14 times
King's Indian - 10 times
French - 9 times
Some of the book lines were short enough to allow different ECO codes in reverse games, this happened in 3/50 paired games including the first pair which had no book at all.
Reverse pairs, wins
There were 3 biased openings with two white wins, a side effect of the generally low draw rate.
Reverse pairs, same moves
Reverse games diverged very quickly, 38% diverged immediately after book, 70% diverged at most after two plys. One opening had 22 plys repeated after book, games 43-44 Caro-Kann, Advance opening.
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