Richard Guy

Richard K. Guy is, with Elwyn Berlekamp and John Conway one of the authors of Winning Ways (for your Mathematical Plays), a seminal book on Combinatorial Game Theory and its applications to a plethora of specific games which, however, says little about go.

He also collaborated with Conway on The Book of Numbers, a survey of many number systems (including surreal numbers) and their properties.

He is an Emeritus Professor of Mathematics at the University of Calgary and a mountaineer. See also his Wikipedia profile.