From the mid-1950s to the begin of 1970s, Heikki Koskinen was one of Finland's leading chess players.
In Finnish Chess Championships he has won four medals: two silver (1958, 1959) and two bronze (1961, 1967).
In 1954, in Prague/Mariánské Lázně Heikki Koskinen participated in World Chess Championship Zonal tournament.
[1] In 1963, in Odense he participated in Nordic Chess Championship.
Heikki Koskinen played for Finland in the Chess Olympiads:[2] Heikki Koskinen played for Finland in the European Team Chess Championship preliminaries:[3] This biographical article relating to a Finnish chess figure is a stub.