How to Play Shikaku

THE PLAYBOOK · ZXZXMR

How to play Shikaku

Choose a round of Shikaku and settle into its rules. Cover the board with non-overlapping rectangles, each containing one clue equal to its area. Use the example below to understand a decision. Keep the instructions close while learning this activity. Choose a clear next step rather than rushing through the instructions.

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

A useful comparison

Compare the worked example with your own position. Use the reasoning, not an answer copied from a different board. Use the example to check your reasoning.

Your goal

Cover the board with non-overlapping rectangles, each containing one clue equal to its area. Read that aim before choosing your first action. Notice how the game responds to your input.

Step by step

1. Choose a rectangle’s opposite corners.
2. It must contain one clue and have the matching area.
3. Click an existing rectangle to remove it.
4. 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. Keep the playing area visible while using these controls. 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. Use the example as a guide rather than a substitute for reading your board. Notice the change in the playing area.

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. Choose one rule to keep in mind for this round. Apply it consistently rather than guessing what another version might allow.

Common questions