Simplify the following text for a Grade 9 native English-speaking person.
Original: In addition , Menchik won two matches against her rival Sonja Graf for the Womenâ s World Champion title ; ( +3 â `` 1 = 0 ) at Rotterdam 1934 , and ( +9 â `` 2 = 5 ) at Semmering 1937 .
Simplified: She won two matches against Sonja Graf for the Womenâ s World Champion title ; ( +3 â `` 1 = 0 ) at Rotterdam 1934 , and ( +9 â `` 2 = 5 ) at Semmering 1937 .