Thermo-Sudoku by Akash Doulani

Thermo-Sudoku by Akash Doulani

PDF

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

Theme: Sun Rays

Author/Opus: This is the 7th puzzle from guest contributor Akash Doulani.

Rules: Standard Thermo-Sudoku rules.

Difficulty: 3.5 stars

Time Standards (highlight to view): Grandmaster = 4:45, Master = 8:30, Expert = 17:00

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.

Thermo-Sudoku by Zoltán Horváth

Thermo-Sudoku by Zoltán Horváth

PDF

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

Theme: Pentominoes

Author/Opus: This is the 12th puzzle from guest contributor Zoltán Horváth.

Rules: Standard Thermo-Sudoku rules.

Difficulty: 4 stars

Time Standards (highlight to view): Grandmaster = 6:45, Master = 9:30, Expert = 19:00

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.

Thermo-Sudoku by Thomas Snyder

Thermo-Sudoku by Thomas Snyder

PDF

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

Theme: Clueless

Author/Opus: This is the 366th puzzle from Thomas Snyder, aka Dr. Sudoku.

Rules: Standard Thermo-Sudoku rules.

Difficulty: 4 stars

Time Standards (highlight to view): Grandmaster = 6:15, Master = 10:00, Expert = 20:00

Solution: PDF; a solution video from the author is also available here and another from Cracking the Cryptic is 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.

Thermo-Sudoku by John Bulten

Thermo-Sudoku by John Bulten

PDF

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

Theme: Floating 74’s

Author/Opus: This is the 69th puzzle from our contributing puzzlemaster John Bulten.

Rules: Standard Thermo-Sudoku rules.

Difficulty: 3 stars

Time Standards (highlight to view): Grandmaster = 4:00, Master = 5:00, Expert = 10:00

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.

Thermo-Sudoku by Bryce Herdt

Thermo-Sudoku by Bryce Herdt

PDF

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

Theme: Hot and Cold

Author/Opus: This is the 16th puzzle from guest contributor Bryce Herdt.

Rules: Standard Thermo-Sudoku rules. (Note: The coloration of the hot/cold thermometers is only for aesthetic purposes and all thermometers obey standard rules.)

Difficulty: 3.5 stars

Time Standards (highlight to view): Grandmaster = 5:30, Master = 8:00, Expert = 16:00

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.

Thermo-Sudoku by Kishore Kumar Sridharan

Thermo-Sudoku by Kishore Kumar Sridharan

PDF

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

Theme: Funnel

Author/Opus: This is the 4th puzzle from guest contributor Kishore Kumar Sridharan.

Rules: Standard Thermo-Sudoku rules.

Difficulty: 2.5 stars

Time Standards (highlight to view): Grandmaster = 3:00, Master = 4:30, Expert = 9:00

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.

Best of 2019: Sudoku Puzzles

Here are our best Sudoku puzzles of 2019, selected from the 31 web posts in this category:

Our first favorite puzzle was a very nicely themed Killer Sudoku by Serkan Yürekli with a rocket theme and a visual countdown in the grid.

Killer Sudoku by Serkan Yürekli

Guest contributor Chris Green put together a paired set of Tight Fit Sudoku with a really interesting challenge that stretched the way you tend to think about this style.

Tight Fit Sudoku by Chris Green

Our next two top Sudoku are both clueless varieties. First, from Thomas Snyder, aka Dr. Sudoku, is this clueless Arrow Sudoku.

Arrow Sudoku by Thomas Snyder

Ashish Kumar made a clueless Thermo-Sudoku in preparation for the World Puzzle Championship that was also one of our top puzzles.

Thermo-Sudoku by Ashish Kumar

But the overall best sudoku of 2019 goes to an unusual puzzle which was a Birthday Surprise Sudoku from Prasanna Seshadri that was a nearly perfect puzzle for his 28th birthday.

Birthday Surprise Sudoku by Prasanna Seshadri

All of these best Sudoku puzzles are collected in this PDF file.