The 2nd ever prisoner’s dilemma tournament that happens entirely on Facebook.

  • 3 rounds: Each round the game played your strategy against each player on the other team 100 times. So if, say, one of the players on the other team was “always cooperate”, you’d probably get 50% cooperate-cooperate and 50% defect-cooperate (since you’re random).
  • Points work like this: cooperate-cooperate = 3 points for each player, defect-cooperate = 5 points for you, 0 for them, cooperate-defect is the opposite (0 for you, 5 for them), and defect-defect is 1 point each. So, after playing someone 100 times, your score for the round would be 50% 3 points and 50% 1 point = 200 points. If both sides cooperated 100% of the time you’d get 3 points * 100 = 300 points. Et cetera.
  • How scores are tallied: Every round you play every player on the other team, and so does everyone else. I use a script to do this so it happens automatically. Each team gets the average score of everyone on it and I report back how each player, and each team did that round. (But you only know the strategies your team used.)
  • Between rounds: You can change your strategy between rounds to try to have the best set of strategies to amass points.
  • How to win: After 3 rounds, the team with the most points is declared the winner! Last time, that was Team Ant. And the people within each team with the most points are MVPs! You can see results here.

Tournament 2!

We learned some interesting things during this trial tournament, and are gonna tweak a few rules to make it even more interesting.

  • Self-organized: Teams will have some players assigned randomly and but some ability to recruit and self-organize prior to the game. This will help people get aligned on strategy ahead of time and make sure they want to be on a team together. We have 4 team captains so far.
  • Democratic: All the rules of the tournament can be changed (including this one) by making a proposal and getting majority vote. Last game we changed the number of rounds and slightly edited the goal of the tournament. This is where meta prisoner’s dilemma can be played.

Want to learn more and possibly play in the next tournament?

Team registration starts Sunday, July 22nd, and the games will start early August! Whether you want to play or just watch, join this Facebook Group.



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Buster Benson

Principal Product Mgr: @Medium. Author: “Why Are We Yelling? The Art of Productive Disagreement”. Notetaker: busterbenson.com. Builder: new.750words.com.