I beat Yoko in this one, by my 200 attempts! :))
Was badly stuck on all kinds of 2 offs, for a veryyyyy long time.
Today I finally got it. Great solution!
Really incredible that Hi19 has this solution in mind when constructing the level!
I did also got stuck with several 52 variations before. Luckily when I triggered the crucial move, I stopped and gave it a thought, and I can see how I can save the 2 steps.
I am unable to give exact number on how many attempts needed as I sometimes restart before reaching the end - maybe around 40-50?
I have spent over half an hour on this and still have 52. I'll be back for the 50.
EDIT: Got it. This is incredibly difficult for its size. Even after solving I barely can understand why this is faster.