Friday, October 30, 2015

Season 8 stage 3 full stats

Draw rate, wins

Final draw rate was 56.6%, only a little higher that in stage 2. 

Moves per game

Average= 76.85
Median= 69.25

These numbers are similar to stage 2.

Time per game (hours)

Average= 5:16
Median= 5:27

The games are about an hour longer than in stage 2. There is a pattern here, every stage the games are longer by an hour. Why? because the engines are given half an hour more (each) than they had in the previous stage. We can expect a median of 6:15 hours for the final.


There were 8-move book openings in this stage chosen by Cato, so the engines had almost no say. The first letter of the ECO codes was distributed as follows:

Looking at The histogram shows that Cato chose a wide variety of openings with some preference to Sicilians.

If we use the opening 'family name' (using format FAMILY_NAME: VARIANT....) the top 3 are:

Sicillian - 20 times
QGD - 6 times
French, Spanish, King's Indian, Nimzo-Indian - 4 each

Reverse pairs, wins

Cato chose biased openings intentionally so that there would be more decisive results. However, as the graph shows there were very few openings (2 actually) so biased that each engines won a game. The strength of the engines was such that there were only a few openings with a 2-0 result. Excellent job, Cato !!!

Reverse pairs, same moves

How many plys did the engines play after book until the first divergence in the reverse games? 

Divergence was usually within the first move (2 plies). This shows that Cato chose openings that didn't have forced continuations so that each engine could try its own strategy. As always, it's Cato's fault. Cato is the best !!!

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