Wait, someone actually submitted CooperateBot? That wasn't just a default entry?

Thoughts on a possible second tournament:

  • I like Luke Somers's suggestion that each matchup should be run several times to smooth out randomness (obviously, bots don't get access to earlier runs, this isn't iterated prisoner's dilemma)
  • Should it include default entries? Perhaps a CooperateBot, a DefectBot, and a RandomBot? Or perhaps just a RandomBot?
  • Should we maybe restrict to a subset of Scheme to make things easier for those of us who want to do static analysis? :) (Ye
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I was a bit irritated that no fewer than three players submitted CooperateBot, as I cooperated with it in hopes of tricking bots like submission B.

EDIT: More offense was taken at my use of the word "trolls" than was intended.

Prisoner's dilemma tournament results

by AlexMennen 1 min read9th Jul 2013124 comments


The prisoner's dilemma tournament is over. There were a total of 21 entries. The winner is Margaret Sy, with a total of 39 points. 2nd and 3rd place go to rpglover64 and THE BLACK KNIGHT, with scores of 38 and 36 points respectively. There were some fairly intricate strategies in the tournament, but all three of these top scorers submitted programs that completely ignored the source code of the other player and acted randomly, with the winner having a bias towards defecting.

You can download a chart describing the outcomes here, and the source codes for the entries can be downloaded here.

I represented each submission with a single letter while running the tournament. Here is a directory of the entries, along with their scores: (some people gave me a term to refer to the player by, while others gave me a term to refer to the program. I went with whatever they gave me, and if they gave me both, I put the player first and then the program)

A: rpglover64 (38)
B: Watson Ladd (27)
D: skepsci (24)
E: Devin Bayer (30)
F: Billy, Mimic-- (27)
G: itaibn (34)
H: CooperateBot (24)
I: Sean Nolan (28)
J: oaz (26)
K: selbram (34)
L: Alexei (25)
M: LEmma (25)
N: BloodyShrimp (34)
O: caa (32)
P: nshepperd (25)
Q: Margaret Sy (39)
R: So8res, NateBot (33)
S: Quinn (33)
T: HonoreDB (23)
U: SlappedTogetherAtTheLastMinuteBot (20)