10 votes

An unusually tricky Galaxy

That was a nice one. Made easier for me by the fact that you said it was hard! Start with the obvious reflections: The third square on the top row can only be associated with one of two centers, so I ...
Dr Xorile's user avatar
  • 22.9k
6 votes

An Irregular Colombian Sudoku

Solution: Step by step: 1: 2: 3: 4: 5: 6: 7: 8: 9:
Beastly Gerbil's user avatar

Only top scored, non community-wiki answers of a minimum length are eligible