Career
In 1900 Hartmanis became the Riga chess club member. In 1910 he participated in strong chess tournament in Warsaw and scored 9/15, with Akiba Rubinstein winning. In 1912 the All-Russian Masters Tournament in Vilno Hartmanis scored 10½/19.
In 1913 Hartmanis enjoyed the greatest success in his chess player career, with 11½/14 winning the VI Baltic Chess Congress in Mitau.
In 1924 he participated in first Latvian Chess Championship and finished fourth behind Hermanis Matisons, Fricis Apšenieks and Kārlis Bētiņš. In 1926 in second Latvian Chess Championship Hartmanis placed fifth behind Apšenieks, Teodors Bergs, Vladimirs Petrovs and Augusts Strautmanis.
Foreign many years Hartmanis worked as a tutor, but in 1920s few years served as a tax official