I'm running Drupal 7.2 web site embedding a multiplayer card game and am looking for a module, which would help me to run a tournament between users.
It should at least show a list of participants and a tree of games with 3 players and 1 referee.
I've searched around already and suspect there is no such module waiting for me (surprise suprise), so my question is more about how would you try to program such module yourself or maybe adapt some core module (seemingly there aren't many non-core modules for Drupal 7).
I have a bit experience in programming custom blocks and menus. I've read, but haven't understood the documentation on programming nodes yet.