Score
0
Time
150s
Best
—
Fill each thermometer from its bulb so every row and column matches its clue. Solve as many grids as you can before time runs out.
The grid is split into thermometers — straight tubes, each with a rounded bulb at one end. A thermometer fills only from its bulb outward: mercury rises in order and can never float in the middle of a tube.
The number on each row's right edge, and under each column, tells you exactly how many cells in that line must end up filled. You have to satisfy every row clue and every column clue at the same time.
Tap a cell to fill its thermometer up to and including that cell. Tap a cell that is already filled to drain everything from that cell to the tip, leaving it filled up to just before. Because the fill always starts at the bulb, you are really choosing how high each thermometer rises.
A clue turns green when its line is exactly right and red if you have filled too many, so you can read your progress at a glance. Solve the whole grid and a new, usually larger one appears at once.
Grids grow from 4×4 toward 6×6 as your score climbs. Your score is the number of grids you complete before the clock reaches zero.
Start with the extreme clues, exactly as you would in a nonogram. A line whose clue is 0 has no filled cells at all — leave every thermometer that passes through it empty there. A line whose clue equals its length must be completely full. Both ends give you certain cells for free, and those certainties immediately constrain the thermometers that cross them.
Remember that a thermometer is filled bottom-up, so its bulb cell is the easiest to fill and its tip is the hardest. If a clue forces a cell near a thermometer's tip to be filled, then every cell below it in that thermometer is filled too — one deduction can settle a whole tube. Conversely, if a clue forces a cell near the bulb to be empty, the entire thermometer above it must be empty as well. Always push these consequences along the tube before moving on.
Then play the two directions against each other. Filling a cell counts toward both its row clue and its column clue, so a cell forced by a row often completes a column for free, and vice versa. Use the colour feedback as a live checklist: a clue gone red means you have raised some thermometer too high and must lower it, while a line still short of its number tells you a thermometer crossing it has to rise further. Work from the forced extremes inward and the grid resolves in a chain rather than by guessing.