He has won the Scottish Chess Championships on two occasions (in 1977 and 2005), and played in two Zonal tournaments (1972 and 1975).

Here are his detailed results, from olimpbase.org: Pritchett represented Scotland nine times+Malta 1980 in Chess Olympiads, from 1966–1990.

Here are his detailed results:[6] Pritchett co-authored the book Best Games of the Young Grandmasters (Bell and Howell, London 1980) with Danny Kopec.

Pritchett wrote Nimzo Indian 4.e3: Nimzowitsch, Hubner, and Taimanov Variations (Batsford 1980).

A forthcoming title from Pritchett in January 2008 is Play the English: A Complete Chess Opening Repertoire for White.