Sunday, September 27, 2020

Season 19 premier division statistics

 A summary statistics table of previous stages and seasons.  

Draw rate, wins

Final draw rate was 81.7%. 

Game termination

The three most common game termination causes were:

51.8% - TCEC draw rule
24.6% - SyzygyTB
13.8% - TCEC win rule

There were no crashes in the stage.

Moves per game

Median= 56.3
Average= 67.0

There were 30 games longer than 100 moves, the longest was 274 moves (AllieStein - Fire, game 203, draw). 

Time per game (hours)

Median= 2:50
Average= 2:51

Openings

There were 8-move book openings in this stage chosen by Cato. The first letter of the ECO codes was distributed as follows:

The engines had almost no freedom to choose the opening variant, all except two of the game pairs repeated the same ECO code and the same opening variant twice. In all of the game pairs the ECO first letter was repeated twice.

Reverse pairs, wins

Reverse pairs, same moves 

Pairs of reverse games diverged very quickly, 38.4% diverged immediately out of book, 72.3% of the pairs diverged at most after 1 move. The longest repeated sequence of moves was 11 plys (AllieStein - Stoofvlees games 136 and 164, French Winawer advance, Smyslov variation, two draws ; AllieStein - Stoofvlees games 192 and 220, Reti accepted, two draws).

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