Quick steps to get started
Drag on the board (hold the left mouse button or swipe with your finger) to draw a rectangle.
Each rectangle must contain exactly one number, and the number must match the count of cells it covers.
Tap a placed rectangle to remove it.
Fill the entire board with no gaps or overlaps to clear the stage.
Use a hint to reveal one correct rectangle.
Your IQ score grows with every clear — climb the leaderboard!
What's it all about?
Kaku is a relaxing logic puzzle based on the classic Shikaku (rectangle division). Split the grid into rectangles so that each rectangle contains exactly one number — and that number equals its size. 2,000 handcrafted levels across 4 difficulties, daily challenges with monthly trophies, and an IQ score that grows with every puzzle you solve. Easy to learn, but Expert 13×13 boards will truly test your logic.
Our player, ratings, and related picks
Play Kaku: Shikaku Logic Puzzle free on CubicRubik in our puzzle collection. We host the game in a fast browser player, keep your recent plays and favorites on our site, and show related titles so your next session is one click away.
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Quick answers before you play
Platforms & genres
