, In France, Tartakower decided to become a professional chess player. Alongside other grandmasters like the Danish
Aron Nimzowitsch and Czechoslovak
Richard Réti, he was a leading figure in
hypermodernism and was not afraid to play so-called “irregular” openings, such as the
Dutch Defense. He also started cooperating with various chess magazines, and wrote several books and brochures on chess. The most famous of these,
Die Hypermoderne Schachpartie (
The Hypermodern Chess Game) was published in 1924 and has been issued in almost 100 editions since. Tartakower took part in many of the most important chess tournaments of his day. In 1927 and 1928 he won two tournaments in
Hastings and shared first place with
Aron Nimzowitsch in London. On the latter occasion, he defeated such notable players as
Frank Marshall,
Milan Vidmar, and
Efim Bogoljubov. In 1930 he won the
Liège tournament, beating
Mir Sultan Khan by two points. Further down the list were, among others,
Akiba Rubinstein, Nimzowitsch, and Marshall. Tartakower won the
Polish Chess Championship twice, at Warsaw 1935 and Jurata 1937. In the 1930s he represented Poland in six
Chess Olympiads, and France in 1950, winning three individual medals (gold in 1931 and bronze in 1933 and 1935), as well as five team medals (gold in 1930, two silver in 1931 and 1939, and two bronze in 1935 and 1937). • In 1930, at second board at the
3rd Chess Olympiad in
Hamburg (+9−1=6); • In 1931, at second board at the
4th Chess Olympiad in
Prague (+10−1=7); • In 1933, at first board at the
5th Chess Olympiad in
Folkestone (+6−2=6); • In 1935, at first board at the
6th Chess Olympiad in
Warsaw (+6−0=11); • In 1937, at first board at the
7th Chess Olympiad in
Stockholm (+1−2=10); • In 1939, at first board at the
8th Chess Olympiad in
Buenos Aires (+7−3=7); • In 1950, at first board at the
9th Chess Olympiad in
Dubrovnik (+5−5=5). In 1935 he was one of the main organizers of the Chess Olympiad in Warsaw. In 1939, the outbreak of World War II found him in Buenos Aires, where he was playing the 8th Chess Olympiad, representing Poland on a team which included
Miguel Najdorf, who always called Tartakower "my teacher". ==Final years==