Group 1b had a 11 games that ended prematurely in an engine crash (not including the first Alfil game that was later replaced by Crafty). I did not include these games in the statistics in order to avoid biases in some of the results - draw rate is an obvious example.
For each category I briefly compare to the group 1a results. The differences represent the preferences of the engines in the two groups.
Draw rate, wins
Moves per game
average = 63.67
Again similar to group 1a, medians and averages within 4 moves.
Time per game (hours)
average = 3:35
Medians and averages within 4 minutes of group 1a stats.
Using ECO codes there were 32 different openings. The top 3 ECO codes were:
C01 6 times - French Exchange
C12 4 times - French: MacCutcheon
C68 4 times - Spanish: Exchange
Using full opening name there were 45 different openings, a little more repetative that in group 1a. There were three openings that were repeated 3 times:
- French: Exchange, 4.Nc3 Nf6 5.Nf3
- French: MacCutcheon, Chigorin Variation
- Spanish: Exchange, 5.O-O Bg4 6.h3
Using only the first letter of the ECO codes we get the following distribution:
If we use the opening 'family name' (using format FAMILY_NAME: VARIANT....) the top 3 are:
French - 16 times
Spanish - 8 times
Nimzo-Indian - 6 times
The French was very popular in group 1a as well, but the Spanish and Nimzo-Indian openings were very rare there.