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Calcudoku

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Logic & numbers
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THE PLAYBOOK · ZJTANSHI

Calcudoku: from controls to your first round

Choose a round of Calcudoku and settle into its rules. Fill a 4×4 Latin square and satisfy every cage arithmetic target. Use the example below to understand a decision. Begin with the solo mode shown on the page. Keep the game area visible while you use its controls.

Twelve puzzles with addition, multiplication, subtraction and singleton cages.

Something to practise

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

What you need to achieve

Fill a 4×4 Latin square and satisfy every cage arithmetic target. The feedback beside the game helps you follow the round. The example below illustrates a decision.

The playing sequence

  1. Select a square and enter 1–4.
  2. Combine all cage digits using its shown operation.
  3. Subtraction uses the absolute difference.
  4. Check puzzle verifies the entire grid.

How your actions work

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. Make sure you are interacting with the game rather than the surrounding page.

See how the rules apply

A two-cell 6× cage contains 2 and 3 in a 1–4 puzzle. Compare this with the rule that governs the move. Verify the rule before continuing.

Avoid this misunderstanding

A correct cage total does not permit duplicate digits in a row. Check the rule before repeating the action. Locate the buttons and input area before beginning a long round. Use the on-screen labels to avoid an accidental restart.

Game-specific help

For a quick reminder, what is the goal of Calcudoku?

Keep this in mind: Fill a 4×4 Latin square and satisfy every cage arithmetic target.

While reading the Guide, how do I control Calcudoku?

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 Calcudoku?

For clarity: A two-cell 6× cage contains 2 and 3 in a 1–4 puzzle.

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

A correct cage total does not permit duplicate digits in a row.

For this browser game, what format does Calcudoku offer?

Here is the relevant explanation: Twelve puzzles with addition, multiplication, subtraction and singleton cages.

While reading the Guide, which play mode does Calcudoku 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.

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