Erik Delwin Osbun vs William G Addison
62nd US Open San Francisco, CA USA round 6.5 1961.08.20
Sicilian Defense: Richter-Rauzer Variation, Classical Variation 1/2-1/2

Robert James Fischer vs Erik Delwin Osbun
Clock simul, 10b Davis, CA USA 1964.04.16
Italian Game: Evans Gambit 1-0