Draw rate, wins
Final draw rate was 55%. There was a preference for white in the decisive games, 3 times more than black wins.
The three most common game termination causes were:
40.8% - TCEC win rule
30% - TCEC draw rule
14.2% - TB position
There were 5 crashes, not a lot but too high for my liking for a second stage. The last one by Jonny shows that we may get more in stage 3.
Moves per game
The games were a bit longer than in stage 1, about 5 moves more.
Time per game (hours)
Despite having a few more moves the game duration was comparable to that of stage 1.
There were 8-move book openings in this stage chosen by Cato, so the
engines had almost no say. The first letter of the ECO codes was
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
French - 20 times
The 8 predetermined moves usually made sure that the reverse pair games had the same opening definition. There were 7 cases where the full opening name was different, of these 3 had different ECO codes.
Reverse pairs, wins
Reverse pairs, same moves