Game guide
How to play Thermometers
Fill each glass thermometer with mercury from its round bulb toward the tip until every row and column total is met.
Logic game guide
Rules
- Every cell belongs to one thermometer: a glass tube that starts at a round bulb and ends at a closed tip.
- Mercury always fills from the bulb upward with no gaps — a tube can be empty, partly filled, or full, but it can never fill from the middle or the tip.
- A red (mercury) cell counts as filled; a plain glass cell counts as empty.
- The number beside each row and below each column is how many filled cells that line must end up with.
How to answer
- Find the round bulb of a tube, then tap a cell along it to fill from the bulb up to that point.
- Tap a cell that is already filled to drain the mercury back down to it.
- Submit when every row and column shows its target number of filled cells.
Solving tips
- A row or column whose number equals its length must be completely filled.
- A line with a 0 must stay empty, which often forces nearby tubes to stop early.
- Because mercury has no gaps, the bulb end of a tube fills before the tip — use that to rule cells in or out.
Playable examples
Thermometers example 1
Practice example · difficulty 1
Thermometers example 2
Practice example · difficulty 3