Uploaded May 2018 | Updated September 2026, 2 weeks ago

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Tit for Tat: the king of Prisoner's Dilemma strategies. Its simplicity masks its depth...but it *can* be beaten!

-Links for the Curious-

A fantastic interview with Press about his findings - edge.org/conversation/william_h_press-freeman_dyson-on-iterated-prisoners-dilemma-contains-strategies-that

An overview of the various algorithms pitted against each other in Axelrod & Press/Dyson's battle royale - axelrod.readthedocs.io/en/stable/reference/overview_of_strategies.html


sfs.uni-tuebingen.de/~roland/Literature/Axelrod(81)_the_evolution_of_cooperation.pdf

A great summary for PNAS of the ZD strategies & their implications - pnas.org/content/109/26/10409?ijkey=bb6675b0fc7e8e43b584727a2ef974e97efde8ef&keytype2=tf_ipsecsha

A summary of ZD strategy extortion - http://numerical.recipes/whp/StewartPlotkinExtortion2012.pdf

Forbes's (now dated) piece on the Generous Tit for Tat strategy - forbes.com/sites/rogerkay/2011/12/19/generous-tit-for-tat-a-winning-strategy/#e9eff3266eb0

A web-based game of the Iterated Prisoner's Dilemma - ncase.me/trust