Individual Battle Scores

Unfortunately it only keeps the averaged result and the number of battles. If I changed it to keep pairings as well I suspect that each bot entry might exceed 1MB, which would break Google App Engine rules. I've considered the possibility of keeping 'min' and 'max' though, would that satisfy you?

That would be nice. Or maybe some kind of confidence or standard deviation or something. Not a big deal, but I would use it if it were there.

If you persist each battle independently, without associating it with other records (no foreign key constraints), then the only limit is total database size.

It would also increase total database writes, which is my current bottleneck.