Shikaku Master: Logic Puzzles

Shikaku Master is a Japanese logic puzzle where every number becomes a rectangle. Divide the grid, train your brain with pure deduction and follow Kapoupo the cat on a cozy adventure through Japan.

Hundreds of Shikaku puzzles, illustrated story chapters and a Daily Puzzle with a worldwide leaderboard. Also known as Rectangles or Divide by Box, Shikaku is a classic pen-and-paper number puzzle built around simple rules and clever deduction.

HOW TO PLAY SHIKAKU
- Divide the grid into rectangles and squares.
- Each shape contains exactly one number.
- That number is the area of the shape: a 6 can be 2×3, 3×2 or 1×6.
- Cover every cell, with no gaps and no overlaps.

Simple rules. Clever deduction. Every puzzle has one logical solution. Read the clues, rule out impossible shapes and enjoy the moment when the last rectangle clicks into place.

FROM BEGINNER TO EXPERT
- Three guided practice puzzles teach you the basics.
- Grids grow from 6×6 to 10×12 as you progress, from easy to hard.
- Drag between two corners to draw a rectangle, tap it to remove it.
- Undo freely and try another approach.
- Hints help you find the next move on a tricky board.

RELAX AT YOUR OWN PACE
In the story adventure there is no timer and no pressure. Take a quick puzzle break, or settle in for a long, calm session. Shikaku Master is a relaxing brain teaser built on focus and concentration. Story mode rewards careful thinking, not speed.

DAILY PUZZLE & LEADERBOARD
Want a challenge? Every day, all players get the same Shikaku grid. One ranked attempt, no hints, the clock is running. Compare your time with players around the world, see how you rank and earn hints based on your final position. Bring them back to the main adventure.

A COZY JOURNEY THROUGH JAPAN
Kapoupo's adventure starts with an unsigned postcard and an old photograph. Solve puzzles to earn coins, then spend them to prepare the trip: fix a quad bike, pack a suitcase, buy a train ticket and help the people you meet along the way.
Watch illustrated scenes come to life as you travel from a village station to a hilltop garden, a kite workshop, a harbor and a lighthouse. Who sent the postcard? Keep solving to find out.

TRAIN YOUR BRAIN, ONE GRID AT A TIME
Shikaku is more than a game. It is a daily workout for your logical thinking, spatial reasoning and attention to detail. Each grid asks you to plan ahead, test a hypothesis and correct your mistakes. Short sessions keep your mind sharp, longer ones let you get into the flow.

FOR FANS OF SUDOKU, NONOGRAMS AND KAKURO
If you love Japanese logic puzzles like Sudoku, Nonograms, Kakuro or Killer Sudoku, Shikaku brings the same pure deduction with a spatial twist: instead of filling cells with digits, you split the board into areas. A perfect next step for puzzle lovers looking for new mind games.

FEATURES
- Hundreds of Shikaku logic puzzles across illustrated story chapters
- New grids added regularly
- Grids from 6×6 to 10×12, easy to hard
- One unique logical solution for every puzzle
- No timer in story mode: play at your own pace
- Daily Puzzle with a worldwide leaderboard
- Hint rewards based on your daily ranking
- Simple touch controls, undo and a quick tutorial
- Coins, travel preparations and illustrated scenes that evolve
- A cozy cat story through Japan
- Brain training for adults, puzzle fans and curious minds

Draw your first rectangle and join Kapoupo on the journey.