Gem Zones
- Rating:
- 6 (5 votes)
- Engine:
- HTML5 / JavaScript
- Platform:
- Browser (Desktop and Mobile)
- Orientation:
- Landscape and Portrait
- Release date:
- August 14, 2026
- Last update:
- August 14, 2026
Gem Zones Game Description
Gem Zones is a colourful placement logic puzzle. Put exactly one gem in every row, every column, and every coloured zone, while making sure no two gems touch — not even diagonally.
Choose Easy, Medium, or Hard and solve endlessly generated 6×6, 8×8, and 9×9 boards with proven unique solutions. Mark impossible cells with crosses, reveal a gem with a hint when stuck, and track your personal best and average solve times for every difficulty.
The zones are the real clue
Rows and columns say the same thing on every board of this kind; the coloured zones are what make each one different. A zone squeezed inside a single row or column claims that line for itself, which rules out every other cell along it — and that one move usually opens the board.
Mark what cannot be
Crosses change nothing in the rules: they are your notes for cells already ruled out, and a drag sweeps a whole row of them on or off, so the board stays readable while you think. A placed gem blocks its row, its column, its zone, and all eight cells around it.
How to play Gem Zones?
Desktop
Click a cell = Cycle empty, cross, gem
Drag from an empty cell = Sweep crosses on
Drag from a crossed cell = Clear crosses
Mobile
Tap a cell = Cycle empty, cross, gem
Drag one finger = Sweep crosses
Both
Undo = Take back one cell
Reset = Clear your marks
Hint = Place one zone's gem
New puzzle = Fresh board
Hint
Exactly one gem in every row, every column and every coloured zone, and no two gems touching — not even diagonally. Crosses are your own notes.
Platform
Browser Desktop , Mobile and Tablet
Release date
August 14, 2026
Last update
August 14, 2026
FAQs
What does the cross do?
Nothing to the rules. It is your own note that a cell is ruled out. Drag from an empty cell to sweep crosses on, drag from a cross to clear.
Can two gems touch diagonally?
No. A gem blocks all eight cells around it, so diagonal neighbours are as illegal as ones directly above, below or beside it.