The statistics include the games involving LCZeroCPU, though their results were ignored in the league results.
Draw rate, wins
Final draw rate was 33%.
Game termination
The three most common game termination causes were:
35.9% - SyzygyTB
30.7% - TCEC win rule
11.1% - TCEC draw rule
There were 3 crashes in the stage: Asymptote, chess22k and ChessFighterNN each crashed once.
Moves per game
Median= 62
Average= 69
There were 30 games longer than 100 moves, the longest was 269 moves (Wasp - LCZeroCPU, game 212, draw).
Time per game (hours)
Median= 1:04
Average= 1:03
Openings
There were 2-move book openings in this stage chosen by Cato. The first letter of the ECO codes was distributed as follows:
The engines had a lot of freedom to choose the opening variant. Only 47.7% of the game pairs repeated the same ECO code twice, and 43.8% repeated the same opening variant. In 9.8% 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, 46.4% diverged immediately out of book, 77.8% of the pairs diverged at most after 1 move. The longest repeated sequence of moves was 11 plys (Jumbo - Winter, games 109 and 262, Four knights Scotch variation, Winter won both games)
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