Machtas twice played for Lithuania in Chess Olympiads: in 1930, at first board in the 3rd Chess Olympiad in Hamburg (+4 –9 =4) and in 1935, at second board in the 6th Chess Olympiad in Warsaw (+2 –7 =5). He became the first ever chess player to represent Lithuania as first board (top seeded) in a world chess Olympiad and to play in a formal match against a reigning world chess champion