The Yau Brothers' renowned double sword technique was defeated by Kiu Fung at Tsui Yin Manor and consequently, the disgraced brothers committed suicide.
With only a few exceptions, most wulin warriors in DGSD would lose to Kiu Fung. How good was the Yau Brothers' technique? How would it fare against opponents such as Deun Yin Hing or Mo Yung Fook?