Hype Thermometers
A relaxing logic puzzle: fill each thermometer from its bulb so every row and column holds exactly as many filled cells as its clue. Every board has one solution and a free, always-correct Hint.
Thermometers Puzzle: how to play, rules & tips
Play the Thermometers puzzle free online. Fill each thermometer from its bulb so every row and column holds exactly as many filled squares as its clue.
How to play the Thermometers puzzle
Straight thermometers cover the whole grid. Each one has a round bulb at one end. Mercury always fills from the bulb upward with no gaps, so a thermometer can be empty, partly filled or full.
Tap a square to raise the mercury up to it. Tap the top of the mercury again to lower it by one square. The numbers beside each row and column tell you how many filled squares that line must hold.
When every row and column matches its clue, the board is cleared.
Thermometers boards and rules
There are 10 boards: four easy 5x5 grids, three medium 6x6 grids and three hard 7x7 grids.
Each board was checked by a solver to have exactly one solution. A row or column that goes past its clue is highlighted. Hint is free and always correct, and Reset empties every thermometer.
Thermometers puzzle tips
- A clue of 0 means every square in that line stays empty. Any thermometer crossing it stops before that square.
- A clue equal to the line's length means every square in it is filled, and so is everything between those squares and their bulbs.
- If a square must be filled, every square between it and its bulb is filled too.
- If a square must be empty, every square past it toward the tip is empty too.
- A thermometer lying along a row fills from its bulb, so a small row clue often decides exactly how far it goes.
Frequently asked questions
Is the Thermometers puzzle free?
Yes. HypeGameRoom is free: no sign-up, no download and nothing to buy to play. Arcade games reward Neons, a play-only currency that can never be cashed out.
Can a thermometer have a gap?
No. Mercury always fills from the bulb with no gaps, so a filled square means every square below it in that thermometer is filled.
Does every thermometer have to be filled?
No. A thermometer can be left empty or only partly filled. Only the row and column clues decide how far each one goes.
Is there a hint?
Yes. Hint is free and always correct.