Yeah..it is challenger level...it is called Gudang Garam Jawa Pos Challenge....sponsored by another tobacco company plus newspapar of east java....
BWF new categorization of international tournaments [starting Jan 1st, 2007]: Category 1: Olympics, World Championships Category 2: Superseries; e.g.: Indonesia Open Superseries, Japan Open Superseries Category 3a: Grand Prix Gold Category 3b: Grand Prix Category 4a: International Challenge; e.g.: Indonesia Challenge, Osaka Challenge Category 4b: International Series Category 4c: Future Series