Calcudoku

THE PLAYBOOK · QTHCC

How to play Calcudoku

This QTHCC page combines Calcudoku with a guide to the decisions it asks you to make. Fill a 4×4 Latin square and satisfy every cage arithmetic target. Use understand the boundary to give your round a clear purpose.

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

Understand the boundary

Check the edition notes and play mode. A local game, a computer opponent and remote multiplayer are different features.

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