Celebrating 400th Puzzle with Tough Thermo Sudoku

There are many Thermometer Sudoku puzzles on the Fun With Puzzles website. This Thermo Sudoku Puzzle is a tough one and requires good pencil marks before we can start solving it. So, I will mark this Thermo Sudoku as tough, and I am publishing it as part of the Fun With Sudoku Series as the 400th Sudoku Puzzle in this Series.

Rules of Thermometer Sudoku Puzzle

Standard Sudoku Rules apply. Additionally, some thermometer shapes are in the grid; digits must be strictly increasing from the round bulb to the flat end.

Thermo Sudoku (Fun With Sudoku #400)

Thermo Sudoku (Fun With Sudoku #400) Solution

This Thermometer Sudoku Puzzle is published as the #400th Sudoku puzzle in Fun With Sudoku. Here are the next and previous Sudoku puzzles published in this series.

Previous Sudoku Puzzle is a Consecutive Sudoku Puzzle (Fun With Sudoku #399)

1st Sudoku Puzzle is Anti-Diagonal Sudoku (Fun With Sudoku #1)

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