SCHEMA:
CREATE TABLE table_14903999_1 (womens_doubles VARCHAR, year VARCHAR, mixed_doubles VARCHAR, womens_singles VARCHAR)
USER:
Who won womens doubles the year magnús ingi helgason tinna helgadóttir won mixed doubles and ragna ingólfsdóttir won womens singles in 2010

QUERY:
SELECT womens_doubles FROM table_14903999_1 WHERE mixed_doubles = "Magnús Ingi Helgason Tinna Helgadóttir" AND womens_singles = "Ragna Ingólfsdóttir" AND year = 2010