 Equally telling, perhaps, are the results of a more recent tournament using the same paramters as Axelrod did. To mark the twentieth anniversary of the publication of Axelrod's book, a number of similar tournaments were staged at the IEEE Congress on Evolutionary Computing in Portland in 2004 and the IEEE Symposium on Computational Intelligence and Games in Colchester 2005. Kendall et al 2007 describes the tournaments and contains several papers by authors who submitted winning entries. Most of the tournaments were deliberately designed to differ significantly from Axelrod's (and some of these are briefly discussed in the section on signaling below). In the one that most closely replicated Axelrod's tournaments. however, TFT finished only fourteenth out of the fifty strategies submitted.