One of my favorite "thinking" games, both in IRC and in real life.
As a tester + script suggester of this snippet, I have to say that this is very, very well made. And this is, surprisingly, a very difficult, challenging game.
What makes this special is that you can play multiple games in the same channel or in different channels; all it records is your address in mask 2 form.

Another great IRC game by Blitzjager.
/me rates 9.0.