How to Play Calcudoku

THE PLAYBOOK · XH0411

How to play Calcudoku

The XH0411 guide to Calcudoku starts with learn from a completed round. Your task is to fill a 4×4 Latin square and satisfy every cage arithmetic target. The controls and example below describe this exact implementation.

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

Learn from a completed round

Finish a round where possible, then identify one decision you would change. Revisit the example or mistake section for a focused second attempt.

Your goal

Fill a 4×4 Latin square and satisfy every cage arithmetic target.

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.

A useful example

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

Watch out for this

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

Common questions