Update: 2023/07/27 – We have opened up a few more of our subscription puzzles to give people a sense of what they may be missing if they aren’t a subscriber. This “warm-up” Thermo-Sudoku is a great example of some of the new easier puzzles that happen every day (alongside harder content) to get solvers back into our different genres; all warm-up puzzles are fair and interesting, even if on the easier side.

Mastering Thermo-Sudoku requires combining number placement thinking with greater than/less than thinking. How will you do on this puzzle from Serkan Yürekli that splits the numbers and the thermometers apart?

PDF

or solve online (using our beta test of Penpa-Edit tools)

Theme: Half and Half

Author/Opus: This is the 393rd puzzle from our managing editor Serkan Yürekli.

Rules: Standard Thermo-Sudoku rules.

Difficulty: 1.5 stars

Time Standards (highlight to view): Grandmaster = 1:00, Master = 1:20, Expert = 2:40

Solution: PDF and solving animation.

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 these books in our e-store.

PDF

or solve online (using our beta test of Penpa-Edit tools)

Theme: 4x4x4 (Note: this sudoku also appeared on the recent Indian Sudoku Championship).

Rules: Standard Thermo-Sudoku rules. Range is 1-9.

Answer String: Enter the 5th row from left to right, followed by a comma, followed by the 5th column from top to bottom.

Time Standards (highlight to view): Grandmaster = 3:00, Master = 4:00, Expert = 8:00

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.

PDF

or solve online (using our beta test of Penpa-Edit tools)

Theme: Grandmaster Puzzles (the G and P shapes in the corners)

Rules: Standard Thermo-Sudoku rules. Range is 1-6.

Answer String: Enter the 5th row from left to right, followed by a comma, followed by the 4th column from top to bottom.

Time Standard: Thermo-Sudoku Master = 0:45, Expert = 2:15, Novice = 7:30

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.