(11 years ago) 2 off, on two different paths (or better: different orders). Huh ... Hope I'll solve before getting a headache. ;) Edit: Finally. 76 tries, for me.
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EDIT 2022, 5th Nov., rebeaten. This time 10 tries. Wanted to add it's a really beautiful structure, that offers soooo many opportunities. Enjoyed solving, a looooot! :)