I looked up zendo on wikipedia and it looks awesome. Is there some way it (or a similar, less visual variant) could be played on the internet among a group of lesswrongers, like the Rationalist Diplomacy games? I could create a number-or-verbal-based version of arbitrary complexity that could be played over IRC or in a thread. I have some time on my hands, so I'll start on a number based version (using strings of numbers that may or may not have the buddha-nature). Anyone else who is interested in a game, please let me know.