Thermometers
Play Thermometers free online: fill thermometers with liquid from the bulb to match row and column clues. A warm logic puzzle with Retro Coins.
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Come funziona
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Thermometers is a puzzle of liquid and logic. A grid contains thermometers — vertical or horizontal shapes with a bulb at one end. Each thermometer must be filled with liquid starting from the bulb, rising continuously upward (or left-to-right) without gaps.
The clue numbers along each row and column tell you exactly how many cells in that line must contain liquid. The challenge is that thermometers may cross multiple rows and columns, so filling one thermometer affects several clues simultaneously.
The solving logic is elegant. A thermometer completely contained within a row contributes to that row's count. If a clue equals the number of thermometer cells in that line, all those cells must be filled. If a clue is zero, none of the thermometer cells in that line can have liquid — which means bulbs in that row cannot be filled at all.
Our RetroPlayNow version features puzzles at multiple sizes, a tap-to-fill interface with continuous liquid animation, real-time count validation, and error highlighting. Every completed warming earns Retro Coins.
How to play Thermometers
- Fill from the bulb. Liquid always starts at the bulb and fills continuously in the thermometer's direction.
- Match row and column clues. The numbers around the grid tell how many cells in each line contain liquid.
- Fill thermometers completely or not at all. Within a single thermometer, liquid is continuous from the bulb. No gaps allowed.
- Use extreme clues. A clue of 0 means no liquid in that line. A clue equal to the number of thermometer cells means all filled.
- Earn Retro Coins. Complete puzzles to score points based on size and solving time. Faster solutions earn more Retro Coins.
