I know that this isn’t exactly what you’re asking, but: Stewart and Plotkin tested two variants of ZD strategies in a variant of Axelrod’s original tournament; one variant (ZDGTFT-2) had the highest total score, beating TFT.
I know that this isn’t exactly what you’re asking, but: Stewart and Plotkin tested two variants of ZD strategies in a variant of Axelrod’s original tournament; one variant (ZDGTFT-2) had the highest total score, beating TFT.