Thermo-Sudoku by Teddy Tan
or solve online (using our beta test of Penpa-Edit tools)
Theme: 20-20 Vision
Author/Opus: This is the 1st puzzle from guest contributor Teddy Tan.
Rules: Standard Thermo-Sudoku rules.
Difficulty: 3.5 stars
Time Standards (highlight to view): Grandmaster = 5:00, Master = 7:30, Expert = 15:00
Solution: PDF; a solution video is also available here.
Note: Follow this link for more Thermo-Sudoku puzzles. If you are new to this puzzle type, here are our easiest Thermo-Sudoku to get started on. More Thermo-Sudoku puzzles can be found in The Art of Sudoku 2 and Masterpiece Sudoku Mix 2.
That took 20 mins, nice puzzle!