Sunday, December 2, 2018

Season 14 division 4 statistics

A summary statistics table of previous stages and seasons. 

Draw rate, wins

Final draw rate was 34.1%. The low draw rate reflects the wide range of engine strengths in this division. In particular ScorpioNN lost 43/44 games and KomodoMCTS won 32/44 games (and lost 1).

Game termination

The three most common game termination causes were:
43.9% - TCEC win rule
17.8% - SyzygyTB
12.9% - TCEC draw rule

ScorpioNN crashed 8 times in the division. It was allowed to continue playing since it lost all its games anyway, it had no effect on the table. Also of note are the 23 games that ended with mate on the board, with ScorpioNN the loser in almost all.

Moves per game

Median= 58.5
Average= 65.1

There were 27 games longer than 100 moves, the longest was 183 moves (Rodent - Tucano, round 37, draw).

Time per game (hours)
Median= 1:12
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:

If we use the opening 'family name' (using format FAMILY_NAME: VARIANT....) the top 3 are:
Sicillian - 26 times
QGD - 14 times
French - 13 times

The engines had a lot of freedom to choose the opening variant. Yet 56.8% of the game pairs repeated the same ECO code twice, and 50.8% repeated the same opening variant. In 10.6% 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, 43.9% diverged immediately out of book, 79.5% of the pairs diverged at most after 1 move. The longest repeated sequence of moves was 10 plys (ScorpioNN - pirarucu, rounds 2 and 13, KGD Keene's defense, pirarucu won both games) 


  1. I am looking for the Division 4 x-table and schedule of results. Not available in TCEC archive. Do you have this information please?

  2. It is available now on the archive, there have been delays in the archive this season. I should post the crosstable for completeness.