Thermometer Sudoku or Thermo Sudoku is one of the very interesting Sudoku variations. Thermo Sudoku puzzles are very fun to solve and these puzzles require some deep logical calculations. Moreover, Thermo Sudoku can be designed to look visually appealing. I have been creating many Thermo Sudoku and Arrow Sudoku puzzles in the last year. Most of these puzzles are submitted for some of the forthcoming Sudoku books. However, there is a great number of leftovers for these Sudoku puzzles which I will be slowly publishing on this website. Currently this Thermo Sudoku I am publishing this as part of the Fun With Sudoku Series as the 331st Sudoku Puzzle in this Series.
The theme of this Thermo Sudoku puzzle is Squares as there are four central squares in the Sudoku grid. This Thermo Sudoku, I will rate this as tough which will require some good logical deductions along with lots of pencil marks to solve this Thermo Sudoku.

## Rules of Thermometer Sudoku Puzzle

Standard Sudoku Rules apply. Additionally, some thermometer shapes are in the grid, and digits must be strictly increasing from the round bulb to the flat end.
 Thermometer Sudoku Puzzle (Fun With Sudoku #331)

The answer to this Thermo Sudoku #331 puzzle can be viewed by clicking on the button. Please try your best to solve this Sudoku puzzle before looking at the answer.

This Thermometer Sudoku Puzzles I am publishing as the #331st Sudoku puzzle in the Fun With Sudoku Series. Here are the next and previous Sudoku puzzles published in this series.
The next Sudoku Puzzle is the Average Sudoku Puzzle (Fun With Sudoku #332)

Aashay Patil said...

32:24 (logical solve). Tough but enjoyable sudoku

Unknown said...

Finished in third attempt
Time taken was aprx 45 minutes
That is why I didn't comment

Rajesh Kumar said...

This is tough Thermo Sudoku and requires some of very narrow calculations. However this Thermo Sudoku completely logically solvable.

kishy said...

21:35.Had to use uniqueness twice to complete the sudoku .Very hard one.

Rajesh Kumar said...

Yes, this was hard one. However I solved this Thermo Sudoku logically by fixing positions of 1 and 2 in central box.

Ramesh said...

Real hard one .. broke once and did it again with total 39 mins
It was challenging.