Manuel Golmayo De La Torriente vs Hermanis Karlovich Mattison
Paris Unofficial Olympiad Paris FRA round 5 1924.07.??
Alekhine Defense 0-1

Mir Sultan Khan vs Hermanis Karlovich Mattison
Prague Olympiad Prague CSR round 4 1931.07.14
Döry Defense 1-0

Hermanis Karlovich Mattison vs Akiba Rubinstein
Karlsbad Karlsbad CSR round 4 1929.08.04
Ruy Lopez: Exchange Variation 0-1

Edgar Colle vs Hermanis Karlovich Mattison
Paris Unofficial Olympiad Paris FRA round 9 1924.07.??
Grünfeld Defense: Flohr Variation 1/2-1/2

Zoltan Vecsey vs Hermanis Karlovich Mattison
Bardejov Bardejov CZE round 1 1926.07.20
Elephant Gambit 0-1

Hermanis Karlovich Mattison vs Karoly Sterk
Paris Unofficial Olympiad Paris FRA round 5 1924.07.??
Caro-Kann Defense 1/2-1/2

Edgar Colle vs Hermanis Karlovich Mattison
Budapest 1st FIDE Masters Budapest HUN round 10 1926.07.03
Döry Defense 1/2-1/2

Hermanis Karlovich Mattison vs Savielly Tartakower
Budapest 1st FIDE Masters Budapest HUN round 7 1926.07.01
Queen’s Gambit Accepted 1-0

Janos Balogh vs Hermanis Karlovich Mattison
Bardejov Bardejov CZE round 8 1926.07.29
Ruy Lopez: Bird’s Defense Deferred 0-1

Stepan Erdelyi vs Hermanis Karlovich Mattison
Prague Olympiad Prague CSR round 10 1931.07.18
Nimzo-Indian Defense: Normal Variation, Botvinnik System 1-0