Tuesday, December 26, 2017

Season 10, rapid tournament statistics

Draw rate, wins

Final draw rate was 38%. Looking at the subtable of only the top 10 engines the draw rate was 53.3%.

Game termination

The three most common game termination causes were:
57.8% - TCEC win rule
15.9% - TCEC draw rule
12.0% - TB position

There were only 11 crashes.

Moves per game

Median= 57
Average= 62.9

The distribution has a tail of long games. There were 47 games (8.5%) with more than 100 moves, the longest was 318 moves long, Fire - Booot.

Time per game (hours)

Median= 0:45
Average= 0:46

The time distribution is almost symmetric, when playing many moves the engines played faster.


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

Open games (C) and indian openings (E) were under-represented, very similar to the rapid stage in season 9. Is this a Cato preference or do the engines prefer to transpose to other openings? 

If we use the opening 'family name' (using format FAMILY_NAME: VARIANT....) the top 3 are:
Sicillian - 86 times
English - 63 times
QGD - 48 times

The engines had a lot of freedom to choose the opening variant. Only 38% of the game pairs repeated the same ECO code twice, and only 20.7% repeated the same opening variant. In 18.5% of the game pairs the ECO first letter was not repeated twice.

Reverse pairs, wins

Reverse pairs, same moves 

The reverse games diverged very quickly, 43% diverged in the first move and 78% diverged at or before the third ply. Only 12 games repeated more than 6 plys.

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