<zzo38> slashlearn cricket//Cricket is one team is in and one team is out, and the team who are out try to get the team who is in to be out, and then the team who was previously out can be in. Whoever earn more points wins, unless you run out of time, in which case nobody wins.

String diagrams would be useful in category theory, except they're unreadable due to being curled up in tiny dimensions. Taneb invented them anyhow.