About Shikaku
Divide the map into rectangles, each containing exactly one number. That number gives its rectangle’s area. Every square must belong to one rectangle.
How to play
- Goal
- Cut the parchment into rectangles, each holding one number equal to its size.
- How it ends
- A survey is solved when every cell belongs to one valid rectangle. There is no way to lose.
- Record
- The fastest first solve of each survey, with its holder's name.
- Drag from one corner of a province to its opposite corner, or tap the two corners.
- The rectangle must contain exactly one numbered landmark and cover exactly that many cells.
- Tile the entire parchment with valid provinces, leaving no gaps or overlaps.
Controls
| Input | Action |
|---|---|
| Drag / two taps | Choose opposite corners of a province |
| Tap a province | Erase it |
| Arrow keys | Move between map cells |
| Space / Enter | Start or place a keyboard rectangle |
| Delete / X | Erase the province under focus |
| Z / R / Escape | Undo, restart, or return to the atlas |
Good to know
All 120 surveys are open, deterministic, uniquely solved, independently verified and ordered within each size by measured deduction difficulty. Named fastest times, completion, one practice attempt, sound and reduced-motion preference persist in this browser.
Watch how to play
Did you know?
A clue of 12 can describe rectangles measuring 1×12, 2×6 or 3×4. Nikoli points to these factor pairs as part of what makes Shikaku a playful way to practise multiplication.
Source: Nikoli: Shikaku
