In December 2020 there was a logic puzzle advent calender on mathebau.rocks. These puzzles will be uploaded to the puzzle portal in the next weeks.
Rules: Draw a closed loop in the diagram that goes horizontally or vertically from point to point. A number indicates, how many neighboured edges are part of the loop.
Solution code: Sizes of areas outside the loop (clockwise, start in the top left corner), X for the largest area
on 25. July 2021, 13:03 by CJK
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