All official Women's Championships except one before World War II were held as round-robin tournaments concurrently with one of the Chess Olympiads, also controlled by FIDE - and all of them were won by the same player: Vera Menchik, by far the dominating figure in this early era of organized women's chess. Menchik, who usually preferred to compete in regular open tournaments against men (and beat several of them), first won the title at the first official Olympiad in London in 1927 and since defended it successfully no less than eight times, six times at subsequent Olympiads (in 1930, 31, 33, 35, 37, and 39, respectively) and twice in matches against Sonja Graf, arguably the second-strongest female player of that era. These matches were arranged largely by the players themselves, much like the open title at the time. The first match (in 1934) was unofficial, while the second one (in 1937) was recognized by FIDE as official.