In their book "Winning Ways for Your Mathematical Plays", Berlekamp, Conway, and Guy used as the 7th condition for a combinatorial game "Both players know what is going on; There is complete information. There is no occasion for bluffing."
Is the "more recent" notion of "perfect information" generally accepted as part of the correct definition, or is this a point of controversy in CGT? So it would seem that the more recent notion would be that a combinatorial game would have perfect information, but may or may not have complete information. So far as I can tell the trio never explicitly define "complete information", nor do they use it in a way that is inconsistent with "perfect information." I don't remember seeing "perfect information" anywhere in the book.