Zürich 1934 was an international chess tournament held in Zürich from 14 to 29 July 1934 to commemorate the 125th anniversary of Schachgesellschaft Zürich (the Zürich Chess Society). Alexander Alekhine won, followed by Max Euwe and Salo Flohr tied for second-third. The tournament also served as the 1934 Swiss Championship, won by Hans Johner as the highest-ranking Swiss player.
The tournament pitted seven Swiss players against nine internationals, including six of the world's leading players. The major omissions were José Raúl Capablanca (Cuba) and Samuel Reshevsky (United States). There were no Soviet players either, and they would not return to international competition until the next year. This type of international tournament in which one third to one half of players were from the host country was first used at Moscow 1925, and later at Moscow 1935 and Kemeri 1937.
The tournament field featured the world champion Alexander Alekhine (France), former world champion Emanuel Lasker (Germany), two-time championship challenger Efim Bogoljubov (Germany), future champion Max Euwe (Netherlands), and championship contender Salo Flohr (Czechoslovakia). Alekhine won with 13/15 points, his only loss being to Euwe who finished tied for second with Flohr at 12. Alekhine again demonstrated his superiority over his contemporaries, although his winning margin of 1 point was much narrower than at Bled 1931 (5½ points) or San Remo 1930 (3½ points).