Draw rate, wins
Final draw rate was 61.0%
The three most common game termination causes were:
37.8% - TCEC win rule
36.3% - TCEC draw rule
14.9% - 3-fold repetition
There were no engine crashes in the division, there was one game where the runner software crashed (game 268, Ginkgo - Houdini). The game reached a drawn 6-man position and was manually set as a draw.
Moves per game
Time per game (hours)
The first double RR was bookless, and a summary of the bookless openings can be found in a previous post.
Here I summarize the results of the remaining games, with book
sequences by Cato. The first letter of the ECO
distributed as follows:
If we use the opening 'family name' (using format FAMILY_NAME: VARIANT....) the top 3 are:
Sicillian - 58 times
English - 24 times
King's Indian - 24 times
The opening variant was mostly determined by the book sequence. 96.4%
of the game pairs repeated the same ECO code twice, and 87.1%
repeated the same opening variant. In all of the game pairs the ECO
first letter was the same in both games.
Reverse pairs, wins
Again I'm restricting to the games with book sequences.
There were only 2 game pairs with a 1-1 biased result.
Reverse pairs, same moves
Here I'm also restricting to the games with book sequences.
Pairs of reverse games diverged very quickly, 51.8% of the pairs
diverged immediately after book, 78.6% repeated at most 2 plys.