How to Play Calcudoku

THE PLAYBOOK · SYCX2Z

How to play Calcudoku

Make Calcudoku your next activity in the game library. Fill a 4×4 Latin square and satisfy every cage arithmetic target. Check the relevant rule before repeating a move. Make your first input carefully and watch the result. Choose a clear next step rather than rushing through the instructions.

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

Build a steady rhythm

Take enough time to read a new position. If a game has a timer, learn its controls first rather than searching for them during the round. Refer to the controls when needed.

Your goal

Fill a 4×4 Latin square and satisfy every cage arithmetic target. The feedback beside the game helps you follow the round. Take a moment to understand the current position.

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. Look at the feedback after the action.

A useful example

A two-cell 6× cage contains 2 and 3 in a 1–4 puzzle. Apply the same reasoning to the position in your own round. Notice the change in the playing area.

Watch out for this

A correct cage total does not permit duplicate digits in a row. A different version of the game may use a different rule. Take enough time to read a new position. If a game has a timer, learn its controls first rather than searching for them during the round.

Common questions