avibryant

The Regex Game
Avi Bryant

This is a game for two programmers, although it's easy to imagine variations for more.
It can be played over email, twitter, or IM, but it's easy to imagine a custom web app for it, and I encourage someone to build one.

Each player starts by thinking of a regular expression. The players should decide beforehand on dialect and length restrictions (eg, has to be JavaScript-compatible and under 20 characters).
They don't reveal the Regex, but if playing over email etc, should send each other a difficult to brute force hash (eg bcrypt) of the Regex for later verification.

They do reveal two strings: one which the Regex will match, and one which it will not.