HOW TO PLAY SHIKAKU
How to play Shikaku
The rules of Shikaku are simple: divide the grid into rectangles so every rectangle contains one number and covers exactly that many cells.
1. Read the numbers
Each number is an area clue. A 6 means the rectangle containing it must cover six cells, such as 1×6, 2×3, 3×2, or 6×1, as long as the shape stays inside the grid.
2. Draw one rectangle per clue
Every patch must contain exactly one number. Drag from one corner to the opposite corner to test a rectangle. If it contains another clue or the wrong number of cells, try a different shape.
3. Fill the whole grid
A Shikaku is complete when no cell is left uncovered. Start with clues near an edge or a corner, then use the remaining empty space to narrow down the harder rectangles.
Frequently asked questions
What should I solve first in Shikaku?
Start with a clue that has few possible shapes, especially a number near a corner or edge. Large clues and crowded areas often provide useful constraints too.
Can a Shikaku rectangle be any size?
It can have any rectangular shape that fits the grid, but its area must equal the clue and it must contain exactly one number.
Does Recto include hints?
Yes. Recto includes smart hints that reveal a logical next move without solving the whole puzzle for you.
More Shikaku guides
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