Dr. Sudoku Prescribes #150 – Thermo-Sudoku
or solve online (using our beta test of Penpa-Edit tools)
Theme: XMas Tree
Rules: Standard Thermo-Sudoku rules.
Answer String: Enter the 1st column from top to bottom, followed by a comma, followed by the 9th column from top to bottom.
Time Standards (highlight to view): Grandmaster = 5:00, Master = 7:15, Expert = 14:30
Solution: PDF
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.
16 mins.A tough sudoku with a narrow path but enjoyable nonetheless.