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ZFR: Hints and solution are in attachments to the first post. I've put gradual hints, so if you get stuck you can read them one by one instead of looking at the full solution.
Hehe, you warned specifically against my personal screw-up :-D
Post edited December 05, 2014 by Wishbone
Oh well. Thought that more people would find that out. Nevertheless, congrats to co-solvers and a last thanks to ZFR for an hour of fun. :)
Post edited December 05, 2014 by helpo1