Wednesday, October 16, 2019

Season 16 superfinal statistics

A summary statistics table of previous stages and seasons. 

Draw rate, wins

Final draw rate was 81%.

Game termination

The three most common game termination causes were:

26% - SyzygyTB
21% - TCEC draw rule
20% - 3-Fold repetition

There were no crashes in the stage. One game ended with mate on the board, very unusual for a superfinal.

Moves per game

Median= 82
Average= 89

The games are longer when NN engines are involved, due to different scoring methods that delay the application of the win and draw rules. There were 32 games longer than 100 moves, the longest was 242 moves (Stockfish - AllieStein, game 54, draw).

Time per game (hours)

Median= 4:09
Average= 3:53


There were variable length book openings in this stage chosen by Jeroen. The first letter of the ECO codes was distributed as follows:

The engines had almost no freedom to choose the opening variant, 94% of the game pairs repeated the same ECO code, 92% repeated the opening variant. In 96% of the game pairs the ECO first letter was repeated twice. A notable exception was the first game pair which was without book.

Reverse pairs, wins


Reverse pairs, same moves

Pairs of reverse games diverged very quickly, 34% diverged immediately out of book, 68% of the pairs diverged at most after 1 move. The longest repeated sequence of moves was 16 plys (AllieStein - Stockfish games 15 and 16, Robatsch defense, pseudo-Austrian attack variation, two draws)

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