Enjoy unlimited puzzles. Challenge yourself and compete with players worldwide every day.
Tetrasquare, also known as Shikaku or Rectangles, is a popular logic puzzle game.
The game is played on a rectangular grid where some squares contain numbers.
Your goal is to divide the grid into rectangular and square pieces so that each piece contains exactly one number, which indicates the area of that rectangle.
Earn higher scores by completing puzzles more quickly.
There is no time limit—compete for the best time record against users from around the world.
Features
- Enjoy an endless supply of puzzles across all difficulty levels.
Play infinite puzzles—enough to last a lifetime.
- Choose from 7 different game levels, ranging from 6x6 to 12x12 grids.
- Autosaving
Your game progress is automatically saved, so you can resume right where you left off.
- Game score recording
All your game scores are tracked and managed for your review.
- Game reset
Made a mistake? Easily reset the game and start fresh.
- Supports 5 languages: English, Korean, Japanese, and two variants of Chinese.
- Various settings
Customize your experience with options like sound effects on/off and language selection.
- Feedback function
Report bugs or share your ideas—stay in touch with the developer.

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