or solve online (using our beta test of Penpa-Edit tools)
Theme: Cosmos Redshift 7
Author/Opus: This is the 2nd puzzle from guest contributor Wei-Hwa Huang.
Rules: Standard Even/Odd Sudoku rules (i.e., cells with a square contain an even digit; cells with a circle contain an odd digit).
Difficulty: 3 stars
Time Standards (highlight to view): Grandmaster = 3:00, Master = 5:15, Expert = 10:30
Note: Follow this link for more Even/Odd Sudoku puzzles. If you are new to this puzzle type, here are our easiest Even/Odd Sudoku to get started on. More Even/Odd Sudoku puzzles can be found in The Art of Sudoku 2.