or solve online (using our beta test of Penpa-Edit tools; use tab to alternate between a composite mode for line/edge drawing, a shading mode, and a shape (star) entry mode for the relay puzzle.)
Author/Opus: This is the 37th puzzle from our contributing puzzlemaster Carl Worth.
Rules: First, solve the top grid puzzle as a Mirror Universe puzzle: Divide the grid along the indicated lines into connected regions – “galaxies” – so that every cell is part of one galaxy and every galaxy has one circle clue inside it. If the galaxy contains a plain circle without any lines, the galaxy must be rotationally symmetric with that circle being the center of rotational symmetry. If the galaxy contains a circle with a horizontal, vertical, or diagonal line, the galaxy must have mirror symmetry when reflecting across the line given in the circle. Also, some cells contain black dots – “asteroids” – which must be symmetrically arranged based on the rules of symmetry (rotational or mirror) for every galaxy that contains them.
Mirror Universe + Asteroids Example by Carl Worth:
Then, copy all ten of the galaxy regions from the solved Mirror Universe into the bottom grid. Solve this puzzle as a Star Battle puzzle with two stars in every row, column, and region.
Answer String: For each row from top to bottom, enter the number of the first column from the left where a star appears. Enter these numbers as a single string with no separators.
Time Standards (highlight to view): Grandmaster = 8:00, Master = 10:15, Expert = 20:30
Note: Follow this link for other classic Star Battles. If you are new to this puzzle type, here are our easiest Star Battles to get started on. More Star Battle puzzles can be found in The Art of Puzzles and in our beginner-friendly collection Intro to GMPuzzles by Serkan Yürekli.