I created a list of 625 "super-neutral" opening positions with this query.
Ok if they are neutral i guess i can simply divide them in to 3 (200 each) and use it. I will run games
with it and see if the result from the three samples is more or less the same.
I thought may be the ECO codes reflect the frequency of each opening in actual games but if all
positions are neutral by a small margin based on your computer analysis, i guess we don't need to classiffy them.
The test positions i am currently using has some gambit openings. I just merged silver,noomen,nunn and gambit pgns.
I don't know this it is right to do this but it game the below distribution which looks ok to me.
I will run the games and come back with results.