Spiral Galaxies (Line) by John Bulten
or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between a composite mode for line/edge drawing and a shading mode.)
Author/Opus: This is the 84th puzzle from our contributing puzzlemaster John Bulten.
Rules: Standard Spiral Galaxies rules. Also, there may not be four consecutive cells that are part of a galaxy in any row or column.
Difficulty: 3.5 stars
Time Standards (highlight to view): Grandmaster = 4:00, Master = 6:30, Expert = 13:00
Solution: PDF; a solution video is also available here.
Note: Follow this link for classic Spiral Galaxies puzzles on this website and this link for variations on Spiral Galaxies puzzles. If you are new to this puzzle type, here are our easiest Spiral Galaxies Puzzles to get started on. More Spiral Galaxies puzzles can be found in The Art of Puzzles 2.
I missed the “there may not be four consecutive cells that are part of a galaxy in any row or column” part of the rules and was able to complete the entire puzzle except for the very final step. Although that extra rule would have helped a lot in the early stage of the puzzle, it doesn’t seem to be required. I wonder if the puzzle could be made harder by removing that requirement and tweaking the end a little.
21 : 34. The middle galaxy was just incredulous.Good construction !
Great puzzle, I really enjoyed how well the no four in a row worked with the spiral galaxy rules.