[1] Ekström was active in high-level national Swedish and international over-the-board chess during a short period of just over five years in the 1940s, with some very impressive successes.
Ekstrom represented Sweden on top board, ahead of Lundin (two) and Danielsson (three), in the two-day, ten-board team match against Denmark, held at Copenhagen in September 1947.
[7] Other than a couple of minor Swedish team events, this seems to be the recorded extent of Ekström's competitive chess career in over-the-board play.
He never represented Sweden in Chess Olympiad competition, although he very well could have, based upon his successes, as he was finishing ahead of team members in tournaments during the 1940s.
Chess Olympiad competition was dormant during Ekstrom's most active period, due to World War II.