How to Play Calcudoku

THE PLAYBOOK · 850305

How to play Calcudoku

The 850305 guide to Calcudoku starts with first-round orientation. 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.

First-round orientation

Before playing, identify the objective and the input controls. Use your first round to learn what changes after a valid action.

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