Game guide · RJCWPX
Calcudoku: from controls to your first round
Calcudoku gives you a focused activity to play in your browser. Fill a 4×4 Latin square and satisfy every cage arithmetic target. Choose a clear next step rather than rushing through the instructions. Choose a comfortable screen position before beginning. Use the example below to understand a decision.
Twelve puzzles with addition, multiplication, subtraction and singleton cages.
Practice with a purpose
After a move, check what changed. Decide which rule explains the new state before acting again. Refer to the controls when needed.
The goal to keep in mind
Fill a 4×4 Latin square and satisfy every cage arithmetic target. Keep that objective in view throughout the round. Notice how the game responds to your input.
Follow these playing steps
- Select a square and enter 1–4.
- Combine all cage digits using its shown operation.
- Subtraction uses the absolute difference.
- Check puzzle verifies the entire grid.
How to use the 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. Check any mode label before starting.
A useful example
A two-cell 6× cage contains 2 and 3 in a 1–4 puzzle. Compare this with the rule that governs the move. Keep the controls nearby.
Check this before moving on
A correct cage total does not permit duplicate digits in a row. Check the rule before repeating the action. Compare the worked example with your own position. Use the reasoning, not an answer copied from a different board.
If you are unsure
What is the goal of Calcudoku?
The key detail is this: Fill a 4×4 Latin square and satisfy every cage arithmetic target.
Before I begin, how do I control Calcudoku?
Here is the relevant explanation: Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution.
What example helps explain Calcudoku?
Keep this in mind: A two-cell 6× cage contains 2 and 3 in a 1–4 puzzle.
What should I watch out for in Calcudoku?
Keep this in mind: A correct cage total does not permit duplicate digits in a row.
While reading the Guide, what format does Calcudoku offer?
Twelve puzzles with addition, multiplication, subtraction and singleton cages.
For this browser game, which play mode does Calcudoku use?
The mode on this page is Solo. Same-device play uses one screen; this game library does not provide internet matchmaking.
For this browser game, where should I start with Calcudoku?
Keep this in mind: Select a square and enter 1–4.
Before I begin, do I need an account or a payment for Calcudoku?
No player account or payment is needed. Game scores are recreational results, not cash prizes.
For my first round, how can I find Calcudoku again?
For clarity: Use the Games list or save this game page in your browser bookmarks. The Guide is linked from the playing page.
For this browser game, how do I report an issue with Calcudoku?
The key detail is this: Use the contact form and include the game name, browser, device and the actions that led to the issue. Do not send passwords or payment details.