Desktop
Click and drag between two corners. Right-click a rectangle to remove it.
ShikakuOfThe.Day
The puzzle, explained
Simple rules. Satisfying logic.
Shikaku is a Japanese logic puzzle about dividing a grid into rectangles. It takes a minute to learn, needs no guessing, and rewards the lovely little moment when every cell falls into place.
How to play
Divide the whole grid
Draw rectangles until every cell is covered. Each rectangle must follow three rules.
6
Here, 6 means six cells.
This 2×3 rectangle has an area of 6, so it is a valid match.
- 1 One numberEach rectangle contains exactly one clue.
- 2 Matching areaThe clue equals the number of cells.
- 3 No gaps or overlapsEvery grid cell belongs to one rectangle.
Controls
Draw, adjust, solve
Mobile
Tap the first and last cell. Press and hold a rectangle to remove it.
Solving strategy
Four useful ways in
When the grid looks busy, look for the clue with the fewest possible rectangles.
Start at edges and corners
Clues near a border can only grow in a few directions, which quickly removes options.
Factor the number
A 12 can be 1×12, 2×6 or 3×4. Check which shapes actually fit around its clue.
Notice forced cells
If every possible rectangle for a clue shares a cell, that cell must belong to it.
Use what remains
Each solved rectangle constrains its neighbours. Recheck nearby clues after every move.
Choose your pace
Five daily difficulties
Every level gets a fresh puzzle each day, and your progress stays on this device.
Your turn
Ready to make some rectangles?
Start small, follow the constraints, and let the grid do the talking.