The shakehand restriction was not a restriction, nor is the small racket - those restrictions I have seen before and they drop your level by at most 300 points, I don't practice penhold or Seemiller and I can play decent with either. The real restrictions were all the ones that Adam won - using the off hand (I have met 2500+ players with 600-level strength off hands, hand switching is not the same as being able to play and rally with the off hand), using a bare blade and using a pre-made. I suspect if Xu Xin had some real practice with the premade, he could have won that challenge.