(13 years ago) Gosh, it took me 19 tries. I doubt I will EVER get used to this kind of levels ... *-*
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EDIT 2023, 12th March - well hidden, like the other one. This one was easier to me, now, probably cause I've done it directly after I've done the other one. :))
Very fun, with many plausible options. Once I saw the winning route, my path to optimization exactly matched the previous records mentioned in david's old comment.