really not difficult for an expert - made a hard medium or easy hard?

start

Done. 1 guess.

g/ng - with 2 (easy) expert tricks

done

Done, two guesses.

done

go

later :(

go

seems I have made an error somewhere :(

done - finally

Difficulty score 57. No green, 1 restart. Easy but interesting.

Buggers. I made a mistake.

Made another mistake. It's not hard. But I guess it is a bit confusing or something.

Did it, no green, no guess. In the end, it was a pretty hard sequence to follow in my head to a contradiction. But I managed.