### Thermo-Sudoku by Thomas Snyder

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Theme: Christmas Tree

Author/Opus: This is the 397th puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard Thermo-Sudoku rules.

Difficulty: 4.5 stars

Time Standards (highlight to view): Grandmaster = 7:30, Master = 16:30, Expert = 33:00

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.

• carpenter says:

Lovely!

• David Altizio says:

Very nice construction to close out the year 🙂 Thanks for all the amazinh puzzles in 2021!

If I may ask, how did you construct this? The interactions between thermometers are quite subtle, especially with the constraints given by the theme.

• drsudoku says:

Thanks for the feedback and glad you enjoyed the puzzle.

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Nf V tbg zbfg bs gur ybj qvtvgf cynprq, gur xrl ohyof jrer gura frg va gur pragre obk naq svsgu/fvkgu ebjf gb trg gur arkg napube cbvagf rfgnoyvfurq. V unq cbgragvny sbe fbzr havdhrarff vffhrf ol univat gbb znal ohyof ng gur gbc, ohg znxvat ybatre cnguf riraghnyyl jbexrq gung bhg.

• JuffoWup says:

Toughie but goodie! Merry Xmas to all at my favorite puzzle site!

• emin says:

very hard but solved thanks

• Menderbug says:

What a lovely solve path. 🙂 Thanks for all the puzzles this year!

• Roger says:

Great construction!

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