How to Play Thermometers
Overview
Thermometers is a logic puzzle where you fill thermometers with mercury. Each thermometer fills from its bulb (rounded end) toward its tip, and the row/column clues tell you how many cells should be filled in each line.
Video Tutorial
Rules
- 1Thermometers have a bulb (rounded end) and a tip (other end).
- 2Mercury fills from the bulb toward the tip - it must be continuous!
- 3If a cell is filled, all cells between it and the bulb must be filled too.
- 4Edge numbers show how many cells are filled in that row or column.
- 5Thermometers can be empty, partially filled, or completely filled.
Controls
ClickFill cell with mercury
Click againMark cell as empty (×)
Click againClear cell (unknown)
Ctrl+ZUndo last move
Solving Strategies
Start with 0 Clues
If a row or column has 0, mark all cells in that line as empty (×).
Maximum Fills
If a clue equals the total cells in that line, fill them all.
Continuity Rule
If you fill a cell, all cells between it and the bulb must also be filled.
Mark Empty Cells
If filling a cell would exceed a clue, mark it empty to help deduce others.