Friday, October 13, 2017

Season 6 superfinal stats

Season 10 is less than a day away, I conclude my season 6 superfinal series with the statistics page I usually post after a stage is over. This is also a way for me to remind myself how I do this and to make sure that the scripts still work.

Next post - season 10 stage 1, first few rounds !! 

Draw rate, wins

Final draw rate was 70.3%. There were 19 decisive games, 3 of which were black wins.

Game termination

The three most common game termination causes were:
35% - TCEC draw rule
30% - TCEC win rule
27% - 3-fold repetition

Tablebase termination was quite rare in season 6, only 6 games. This is probably due to the fact that only 5-man tablebases were used for termination.

Moves per game



There were 4 games with more than 100 moves, usually draws containing very long boring shuffles.

Time per game (hours)

Median= 3:57
Average= 3:59


The first letter of the ECO codes of the superfinal openings was distributed as follows:

Cato's chosen openings for the superfinal covered all classes, a little biased for closed games (D) and indian defences(E).

If we use the opening 'family name' (using format FAMILY_NAME: VARIANT....) the top 3 are:
Slav - 10 times
King's indian - 7 times
Sicilian - 6 times

Each opening had 8 predetermined moves, and almost all the reverse pairs had the same ECO code, even the same full opening name. The one exception was unusual, game 59 had an ECO code of C05 and game 60 had an ECO code of E75.

Reverse pairs, wins

There were 4 cases of an opening with two white wins, potentially a biased opening. 

Reverse pairs, same moves

How many plys did the engines play after book until the first divergence in the reverse games?

Most games (59%) repeated at most 1 full move, only 19% repeated more than 3 moves.  The longest repeat was 9.5 moves in games 55 and 56.

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