Thermometer Puzzle is a logic game played on a rectangular grid. Each cell contains so-called thermometers – special shapes that extend upward from a rounded base (the "bulb"). Your objective is to fill cells so that the number of filled spaces in each row and column matches the numbers given at the edges of the grid. Thermometers must always be filled from the bulb upward. By using logical deduction and elimination, you gradually work your way toward the solution.
5 Tips for Mastering Thermometer Puzzle
1. Start with full rows and columns
If a row or column has a number equal to its total number of cells, you can fill all of them immediately – a great starting point.
2. Use zero clues to your Advantage
If a row or column has a zero next to it, no cells in that line should be filled. This allows you to eliminate any thermometers crossing it right away.
3. Pay attention to fill direction
Thermometers can only be filled from the bulb upward. If a segment is filled, all segments below it must be filled as well.
4. Apply elimination logic
When you are certain a cell cannot be filled, mark it as empty. This gradually sharpens the picture of the correct solution.
5. Fill partial solutions first
Even if the full solution is unclear, fill in any sections you’re confident about – such as the lower part of a long thermometer. These partial steps often lead to key breakthroughs.
More games
In Battleship, you play against the computer and try to sink its hidden ships by targeting the correct positions on the grid.
Play now
Arukone is a logic puzzle where players connect matching pairs on a grid without crossing lines to solve the puzzle.
Play now
In Connect Four, the goal is to be the first player to align four of your own game pieces horizontally, vertically, or diagonally.
Play now
Fill in a 9x9 grid so that each row, column and 3x3 box contains the numbers 1 to 9.
Play now
Bubble Shooter is a puzzle game where players pop colored bubbles by strategically shooting matching ones.
Play now
Bingo is a game of chance where players mark numbers on cards as they are randomly drawn to complete predefined patterns and win.
Play nowWe value your opinion
Do you feel there's something we can add or improve? Are there features missing that you'd like to have? Perhaps you have suggestions for how we can make this site better for you? We're always grateful for your input.