Game guide · BDPSFJS
A practical guide to Shikaku
Bring your attention to one round of Shikaku. Cover the board with non-overlapping rectangles, each containing one clue equal to its area. Check the relevant rule before repeating a move. Compare the starting position with the example in the Guide. Use the example below to understand a decision.
Solve ten 5×5 rectangle puzzles. Each clue belongs to exactly one rectangle of the stated area.
Something to practise
When a decision goes wrong, compare it with the common mistake described below. Start again only when you intend to leave the current round. Use the example to check your reasoning.
What counts as success
Cover the board with non-overlapping rectangles, each containing one clue equal to its area. Read that aim before choosing your first action. Check the rules when you are unsure.
Start here and follow along
- 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.
Input guidance
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. Avoid pressing the same control repeatedly while a move is being processed.
See the idea in action
A clue 6 may occupy a 2×3 rectangle when other clues allow it. Compare this with the rule that governs the move. Choose a deliberate next step.
A mistake to avoid
No rectangle may contain two clues or overlap another. Take a moment to reassess the position before continuing. Read one step at a time and try it on the playing area. Match the instruction to the control you use.
Helpful answers for players
While reading the Guide, what is the goal of Shikaku?
For clarity: Cover the board with non-overlapping rectangles, each containing one clue equal to its area.
As a new player, how do I control Shikaku?
The key detail is this: Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution.
When I return, what example helps explain Shikaku?
A clue 6 may occupy a 2×3 rectangle when other clues allow it.
Before I begin, what should I watch out for in Shikaku?
No rectangle may contain two clues or overlap another.
Before I begin, what format does Shikaku offer?
Solve ten 5×5 rectangle puzzles. Each clue belongs to exactly one rectangle of the stated area.
When I return, which play mode does Shikaku use?
Here is the relevant explanation: The mode on this page is Solo. Same-device play uses one screen; this game library does not provide internet matchmaking.
For a quick reminder, where should I start with Shikaku?
Keep this in mind: Choose a rectangle’s opposite corners.
As a new player, do I need an account or a payment for Shikaku?
No player account or payment is needed. Game scores are recreational results, not cash prizes.
For this browser game, how can I find Shikaku again?
Keep this in mind: Use the Games list or save this game page in your browser bookmarks. The Guide is linked from the playing page.
While learning, how do I report an issue with Shikaku?
Here is the relevant explanation: Use the contact form and include the game name, browser, device and the actions that led to the issue. Do not send passwords or payment details.