Example
A clue marked 6 belongs inside one rectangle that covers exactly six squares.
How to play
Choose a start square, then choose an end square to draw a rectangle. You can also drag across the grid. Every rectangle must contain one clue whose number matches its area.
Questions
What is Shikaku?
Shikaku is a number puzzle. Draw rectangles around the clues. Each rectangle has the area shown by its clue, and all grid squares must be used once.
Can a rectangle contain two numbers?
No. Each rectangle must contain exactly one number clue.
Is every puzzle solvable?
This game only accepts generated boards with one verified solution.
Does my progress leave this device?
No. Progress is stored only in this browser unless you clear its site data.
About this game
Puzzles are made in your browser. A larger grid can take a moment on a slower device. No account or file upload is needed.