Season 21 league 1 statistics

A summary statistics table of previous stages and seasons.  

Draw rate, wins

Final draw rate was 58.0%. 

Game termination

The three most common game termination causes were:

41.1% - TCEC draw rule
33.9% - SyzygyTB
20.5% - Mate

There were no crashes in the stage.

Moves per game

Median= 67.5
Average= 70.0

There were 10 games longer than 100 moves, the longest was 151 moves (SlowChess - rofChade, game 90, draw). 

Time per game (hours)

Median= 1:37
Average= 1:35

Opening

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

The engines had a little freedom to choose the opening variant, 96.5% of the game pairs repeated the same ECO code twice, 94.6% repeated the same opening variant twice. All game pairs repeated the first letter of the ECO code.

Reverse pairs, wins

Reverse pairs, same moves

Pairs of reverse games diverged quickly, only 25.0% diverged immediately out of book, 53.6% of the pairs diverged at most after 1 move. The longest repeated sequence of moves was 7 plys (RubiChess - Nemorino, games 5 and 33, QGD Chigorin defence, Janowski variation, two draws)