Broken Sign Blog
#019: Rail Pool (Hexagonal)
10 June 2022I love exploring puzzles (and other systems) on different types of grids, and a hex grid seemed like the lowest-hanging fruit for Rail Pool. As it turns out, constructing loop puzzles on hex grids is surprisingly difficulty because the additional freedom makes it quite tough to constrain the loop sufficiently.
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.
Variant: Hexagonal — The grid is hexagonal.