Shikaku is an online puzzle game inspired by a traditional
Japanese game, recently reintroduced as Patches by LinkedIn.
drag to draw ·
right-click or
Erase to remove
each rectangle must contain
exactly one number equal to its area
how to play
- Divide the grid into non-overlapping rectangles that together cover every cell exactly once.
- Each rectangle must contain exactly one number. That number equals the rectangle's area — width × height.
- Drag across the grid to draw a rectangle. The preview turns red if it would overlap an existing one.
- Right-click any rectangle to erase it, or toggle Erase mode and drag to remove several at once.
- The puzzle is solved when every cell is covered and every number matches its rectangle's area.
Example: a cell showing 6 must be inside a rectangle that is 1×6, 2×3, 3×2, or 6×1 — whichever fits.