Thursday, March 20, 2025

Genre Spotlight 22: Spur Loop (Puzzles 261 and 262)

Next on the list is Spur Loop.  I suspect this genre is more common than the other two, but "maze"-like puzzles are not quite as popular as they used to be.  Spur Loop reminds me of Ring-ring a lot, to the point where I think a doppel between the two genres should be doable.

Rules:  Draw a crossing loop passing through all cells.  Each segment of the loop must have length at least two.

                  

Both puzzles today are pretty tricky.  The conditions can be restrictive at times, so I wanted to make sure there weren't too many black squares in the grid.  This results in puzzles whose solve paths spike in difficulty after an initial setup period.  Like other crossing loop puzzles, cross-marks to denote where the loop can't go will be very helpful.

Puzzle 261 (Penpa)

Puzzle 262 (Penpa)

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