How to Play Shikaku

THE PLAYBOOK · BOYUEJINSHU

Use a short break to learn the rhythm of Shikaku. Cover the board with non-overlapping rectangles, each containing one clue equal to its area. Look at what changes after your first action. Begin with the solo mode shown on the page. Check the relevant rule before repeating a move.

Solve ten 5×5 rectangle puzzles. Each clue belongs to exactly one rectangle of the stated area.

Notice the feedback

Watch the feedback after an action. A message can explain whether the input was accepted or whether a rule needs attention. Keep the objective visible.

Your goal

Cover the board with non-overlapping rectangles, each containing one clue equal to its area. The feedback beside the game helps you follow the round. The example below illustrates a decision.

Step by step

Choose a rectangle’s opposite corners.
It must contain one clue and have the matching area.
Click an existing rectangle to remove it.
Cover every square to finish.

Controls

Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution. Read a button’s label before selecting it. Use the visible help when you are unsure of the next input.

A useful example

A clue 6 may occupy a 2×3 rectangle when other clues allow it. Apply the same reasoning to the position in your own round. Keep the controls nearby.

Watch out for this

No rectangle may contain two clues or overlap another. Read the feedback to see why an action did not have the expected result. Before your first action, say what you are trying to achieve. Then compare the result with the goal.

Common questions

For my first round, what is the goal of Shikaku?

Here is the relevant explanation: Cover the board with non-overlapping rectangles, each containing one clue equal to its area.

When I return, how do I control Shikaku?

Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution.

As a new player, what example helps explain Shikaku?

For clarity: A clue 6 may occupy a 2×3 rectangle when other clues allow it.

On this playing page, what should I watch out for in Shikaku?

The key detail is this: No rectangle may contain two clues or overlap another.

What format does Shikaku offer?

For clarity: Solve ten 5×5 rectangle puzzles. Each clue belongs to exactly one rectangle of the stated area.

As a new player, which play mode does Shikaku use?

The mode on this page is Solo. Same-device play uses one screen; this game library does not provide internet matchmaking.