How to Play Calcudoku

THE PLAYBOOK · CQXSJINPENG

How to play Calcudoku

Bring your attention to one round of Calcudoku. Fill a 4×4 Latin square and satisfy every cage arithmetic target. Use the example below to understand a decision. Keep the instructions close while learning this activity. Use the example below to understand a decision.

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

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

Fill a 4×4 Latin square and satisfy every cage arithmetic target. Keep that objective in view throughout the round. The example below illustrates a decision.

Step by step

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.

Controls

Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution. Use the control method described here for this activity. Read the example below alongside these instructions.

A useful example

A two-cell 6× cage contains 2 and 3 in a 1–4 puzzle. Your next round may have a different position, so inspect it before acting. Read the matching step again.

Watch out for this

A correct cage total does not permit duplicate digits in a row. Read the feedback to see why an action did not have the expected result. Watch the feedback after an action. A message can explain whether the input was accepted or whether a rule needs attention.

Common questions