I have a list of around 20k games played on a popular online website. I would like to run some statistical analyses on these games. I'm not talking about analysing specific games, but rather finding common patterns that arise.
I've looked at some popular sites on the internet that provide such statistics, but I'm wondering if there might be any more. So far I've got:
- Popular openings grouped by ECO.
- Most common endgames.
- Average rating difference between opponents.
- Frequent players.
- Longest streak (rematch count).
What other kinds of statistics might reveal something about the community, players, tendencies and more?
Thanks for the suggestions so far. I apologize if I wasn't very clear with the question, so let me clarify some things: I would like to avoid analysing all the games (such as finding the point at which its +-2, or finding recurring tactical motifs, as these require going through each game and running it by an engine). I'm more interested in getting information and statistics about that particular collection of games, so having access to more games isn't necessarily a better thing. I hope this can steer the answers in the intended direction.