Broken Sign Blog
#010: Rail Pool — "Minefield"
10 May 2022It took me quite a while to get this idea to work, so I still can’t quite believe how clean the final clue placement ended up being. This is probably one of my best Rail Pools in terms of both visual and logical theme.
Just to clarify since this didn’t show up on the blog before: the black cell is simply not part of the grid and doesn’t get visited by the loop.
Solve it online:
Rules: Draw a non-intersecting loop through the centres of all cells. Some boldly outlined regions contain number clues. If a straight loop segment visits any cells of a clued region, its length must match one of these numbers. Each number must correspond to at least one such loop segment. Question marks represent any positive integer, but numbers cannot repeat within a region.