Fridrik Olafsson vs Jon Gudmundsson
Reykjavik Reykjavik ISL 1953.??.??
Sicilian Defense: Scheveningen Variation, Classical Variation 1-0

Jon Gudmundsson vs Ladislav Prokes
Hamburg Olympiad Hamburg GER round 11 1930.07.21
English Opening: King’s English Variation, Four Knights Variation, Fianchetto Line 0-1

Jon Gudmundsson vs Salo Landau
7th olm final Stockholm SWE round 5 1937.08.03
Slav Defense: Exchange Variation, Symmetrical Line 1/2-1/2