Like Sudoku or nonograms? Try Thermometers.
The one-answer logic of Sudoku, the edge counts of nonograms, and a twist all its own. Mercury has to rise from the bulb.
Mercuro, the Thermometers puzzle for iPhone and iPad
Free to play. No subscription.
The Sudoku part
A well-made Sudoku has a single solution (Wikipedia: Sudoku), and you reach it by ruling things out, never by guessing. Thermometers runs on the same promise. Every Mercuro board has exactly one answer, and every cell can be worked out from the clues.
There are no digits to place. Each cell is filled or empty, so the logic is about counting and order instead of which number goes where.
The nonogram part
Nonograms put numbers on the edges of the grid and ask you to fill cells or leave them blank (Wikipedia: Nonogram). So does Thermometers. The difference is what the numbers mean. A nonogram clue lists runs of filled cells; a Thermometers clue is a plain count, and the thermometer shapes do the rest.
The new part
The glass adds order. Mercury starts at the bulb and rises without gaps, so a filled cell means every cell back to the bulb is filled too, and an empty cell means everything beyond it is empty. Most of the solving is playing those two facts against the counts.
See the rules and a worked example.
Questions
Do I need to do any maths?
Only counting. No number is ever bigger than the length of a row.
Is there a picture at the end, like a nonogram?
No. The reward is the solved board, not a hidden image.
Where can I play Thermometers?
Mercuro, on iPhone and iPad, is free with 330 puzzles and three new ones a day.
More guides
- How to play Thermometers puzzlesThree rules and a 4x4 solved move by move.
- 6×68×811×11Three new logic puzzles every dayWarm-Up, Daily, Challenge, and a two-week archive.
- $4.99onceA logic puzzle game with no subscription330 puzzles free. $2.99 or $4.99, paid once.
- Level packs$4.49 subscriptionPay onceA Grids of Thermometers alternativeNo packs, no subscription, three dailies a day.
- 5×57×79×912×12An alternative to Thermometers - Logic Puzzles660 curated boards against a library of 9,000.
- Mercuro overviewEvery feature, drawn and playable.
How Mercuro is built, the solver, generator and hint engine behind these puzzles.