Shikaku
Slice the grid into rectangles so every number tells the truth. A calm, tactile puzzle game of pure deduction, spatial reasoning, and elegant geometry.
Experience the Mechanics
Each rectangle must contain exactly one number, equal to its area.
Designed for Calm, Deliberate Focus
A thoughtful blend of minimalist game design, tactile interaction, and classic logic puzzle heritage.
Pure Japanese Logic
No guessing or trial-and-error required. Every puzzle is uniquely constructible through pure deduction and spatial geometry.
50 Levels + Generator
Climb through 50 handcrafted progression stages or generate infinite custom boards across Easy, Medium, Hard, and Expert.
Daily Challenges
Enjoy a fresh, synchronized daily puzzle every 24 hours. Track your streak and compare your best solving times.
Tactile Clay & Audio
Immerse yourself in rich claymorphic visual depths, soft UI click soundscapes, and calming ambient background audio.
100% Offline & Private
No account creation, no sign-in required, and no remote cloud tracking. All your stats and progress stay securely on your device.
Helpful Controls
Intuitive drag-to-draw gestures, quick one-tap erase, multi-step undo, and gentle smart hints whenever you need a slight spark.
How to Play Shikaku
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1
Divide into Rectangles
Partition the entire grid into separate non-overlapping rectangles or squares.
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2
One Number Per Shape
Each drawn rectangle must encompass exactly one numbered clue tile inside its boundaries.
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3
Area Equals Clue
The rectangle's area (width × height) must match the enclosed clue number exactly.
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4
Cover Every Cell
Drag to draw, tap to erase. When every cell is neatly covered with valid shapes, the puzzle is solved!