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.