Monday, February 12, 2018

Season 11 division 1 statistics

Draw rate, wins

Final draw rate was 62.9%.

Game termination

The three most common game termination causes were:
33.9% - TCEC win rule
32.1% - TCEC draw rule
18.8% - 3-fold repetition

There were 4 crashes in the division, two for Hannibal and two for Nirvana. After they were llimited to 16 threads they became stable and were not disqualified with a third crash. Both were relegated to division 2 in any case.

Moves per game

Median= 62
Average= 69

The game lengths were similar to those in division 2.

Time per game (hours)

Median= 2:05


The first double RR was bookless, and a summary of the bookless openings can be found in a previous post. Here I summarize the results of the remaining games, with book sequences by guest Nikolaos Konstantakis. The first letter of the ECO codes was distributed as follows:

If we use the opening 'family name' (using format FAMILY_NAME: VARIANT....) the top 3 are:
Caro-Kann - 16 times
Sicillian - 15 times
English, King's Indian, Nimzo-Indian, Slav - 10 times

The opening variant was mostly determined by the book sequence. 90.5% of the game pairs repeated the same ECO code twice, and 85.7% repeated the same opening variant. In only 2.4% of the game pairs the ECO first letter was not repeated twice.

Reverse pairs, wins

Again I'm restricting to the games with book sequences.

There were 7 game pairs with a 1-1 biased result.

Reverse pairs, same moves 

Here I'm also restricting to the games with book sequences.

Pairs of reverse games diverged very quickly, 45.2% of the pairs diverged immediately after book, 84.5% repeated at most 2 plys.

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