Curtis Carlson vs Robert Shean
CUDC Open Denver, CO round 5 1973.04.29
Sicilian Defense: Dragon Variation, Yugoslav Attack 1-0

Bruce Alberston vs Curtis Carlson
80th US Open Chicago, IL USA round 7 1979.08.05
Nimzo-Indian Defense: Spielmann Variation, Karlsbad Variation 1/2-1/2