Game guide · BJQBTX
Rules, controls and help for Calcudoku
Make Calcudoku your next activity in the game library. Fill a 4×4 Latin square and satisfy every cage arithmetic target. Look at what changes after your first action. Choose a comfortable screen position before beginning. Use the example below to understand a decision.
Twelve puzzles with addition, multiplication, subtraction and singleton cages.
An idea for your next attempt
Watch the feedback after an action. A message can explain whether the input was accepted or whether a rule needs attention. Use the example to check your reasoning.
Your goal
Fill a 4×4 Latin square and satisfy every cage arithmetic target. An attractive position is not enough unless the goal is met. Notice how the game responds to your input.
How a round unfolds
- 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 interact with the game
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. Read the example below alongside these instructions.
See how the rules apply
A two-cell 6× cage contains 2 and 3 in a 1–4 puzzle. Focus on why the action is allowed, not only its outcome. Look for the relevant detail.
Check this before moving on
A correct cage total does not permit duplicate digits in a row. Compare the situation with the worked example. After a move, check what changed. Decide which rule explains the new state before acting again.
A few questions answered
While reading the Guide, what is the goal of Calcudoku?
Fill a 4×4 Latin square and satisfy every cage arithmetic target.
On this playing page, how do I control Calcudoku?
Keep this in mind: Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution.
While reading the Guide, what example helps explain Calcudoku?
Keep this in mind: A two-cell 6× cage contains 2 and 3 in a 1–4 puzzle.
For a quick reminder, what should I watch out for in Calcudoku?
Here is the relevant explanation: A correct cage total does not permit duplicate digits in a row.
Before I begin, what format does Calcudoku offer?
For clarity: Twelve puzzles with addition, multiplication, subtraction and singleton cages.
For this browser game, which play mode does Calcudoku use?
For clarity: The mode on this page is Solo. Same-device play uses one screen; this game library does not provide internet matchmaking.
Where should I start with Calcudoku?
The key detail is this: Select a square and enter 1–4.
While reading the Guide, 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 this browser game, 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.
As a new player, how do I report an issue with Calcudoku?
For clarity: 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.