Question: In 2004, where the womens singles is Daniela Kressig who is the mens singles
SQL: SELECT "Mens singles" FROM "1-15001681-1" WHERE "Womens singles" = 'Daniela Kressig';

Question: What is the most current year where the women's doubles champions are Astrid Eidenbenz Claudia Jehle
SQL: SELECT MAX("Year") FROM "1-15001681-1" WHERE "Womens doubles" = 'Astrid Eidenbenz Claudia Jehle';

Question: In the year 2006, the womens singles had no competition and the mens doubles were Roland Hilti Kilian Pfister, what were the womens doubles
SQL: SELECT "Womens doubles" FROM "1-15001681-1" WHERE "Womens singles" = 'no competition' AND "Mens doubles" = 'Roland Hilti Kilian Pfister' AND "Year" = 2006.0;

Question: In 2001, where the mens singles is Armand Jehle and the womens singles is Michaela Ritter, who are the mixed doubles
SQL: SELECT "Mixed doubles" FROM "1-15001681-1" WHERE "Womens singles" = 'Michaela Ritter' AND "Mens singles" = 'Armand Jehle';

Question: In 1987 who was the mens singles
SQL: SELECT "Mens singles" FROM "1-15001681-1" WHERE "Year" = 1987.0;