Even/Odd Sudoku by Thomas Snyder
[This puzzle comes from the 2022 US Sudoku Grand Prix round. The majority of the sudoku variants had visual “eight” themes as well as interesting logical paths. This Even/Odd Sudoku uses a symmetrical set of even/odd cells in only a few rows and columns in an “eight” shape to highly constrain the grid. I deliberately tried to avoid giving any eights on the outside frame of the grid.]
or solve online (using our beta test of Penpa-Edit tools)
Theme: Big Eight
Author/Opus: This is the 438th puzzle from Thomas Snyder, aka Dr. Sudoku.
Rules: Standard Even/Odd Sudoku rules (i.e., cells with a square contain an even digit; cells with a circle contain an odd digit).
Estimated Difficulty: 3 stars
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 and Masterpiece Sudoku Mix 1.