Tuesday, April 24, 2018

Season 12 division 4 statistics

Draw rate, wins

Final draw rate was 25.9%. This is unusually low, and in part due to the fact that Leela lost almost all of its games

Game termination

The three most common game termination causes were:
63.4% - TCEC win rule
11.6% - TCEC draw rule
9.8% - TB position

There were 2 games that ended in mate on the board, Leela games in both cases, extreme examples of Leela blunders. There were 7 crashes, all by Scorpio. 

Moves per game


Median= 59.8
Average= 66.3

Includes 5 games where Scorpio crashed almost immedately out of book, and one of the longest games in TCEC history with 353 moves (Fruit - Scorpio, round 6, draw).

Time per game (hours)

Median= 1:11
Average= 1:12


There were 2-move book openings in this stage chosen by Cato. The first letter of the ECO codes was distributed as follows:

For each round all four games had the same book sequence, and again in the reverse round. There were 14 book sequences, each repeated 8 times. For some sequences all the openings had similar codes (e.g. Sicillian or French). In others the engines had more freedom to choose.

If we use the opening 'family name' (using format FAMILY_NAME: VARIANT....) the top 3 are:
Sicillian - 24 times
QGD - 20 times
English - 13 times

The engines had a lot of freedom to choose the opening variant. Only 25% of the game pairs repeated the same ECO code twice, and only 5.4% repeated the same opening variant. In 19.6% of the game pairs the ECO first letter was not repeated twice.

Reverse pairs, wins


Reverse pairs, same moves 


Pairs of reverse games diverged very quickly, 82.1% of the pairs diverged at most after 1 move. One game pair repeated 7 moves after book (Tucano - Xiphos, rounds 25 and 22, Grünfeld: Modern Exchange).


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