Calcudoku

Game guide · TIANNBO

Understand the basics of Calcudoku

Choose a round of Calcudoku and settle into its rules. Fill a 4×4 Latin square and satisfy every cage arithmetic target. Use the example below to understand a decision. Choose a comfortable screen position before beginning. Choose a clear next step rather than rushing through the instructions.

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

Build familiarity through play

When a decision goes wrong, compare it with the common mistake described below. Start again only when you intend to leave the current round. Use the example to check your reasoning.

The purpose of your moves

Fill a 4×4 Latin square and satisfy every cage arithmetic target. Read that aim before choosing your first action. Follow this game’s rules rather than another version’s.

Step by step

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.

Getting comfortable with 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. Contact us with the game and device if a control does not respond.

See how the rules apply

A two-cell 6× cage contains 2 and 3 in a 1–4 puzzle. Use the example as a guide rather than a substitute for reading your board. Notice the change in the playing area.

Notice this detail

A correct cage total does not permit duplicate digits in a row. Compare the situation with the worked example. Watch the feedback after an action. A message can explain whether the input was accepted or whether a rule needs attention.

Helpful answers for players

While learning, what is the goal of Calcudoku?

The key detail is this: Fill a 4×4 Latin square and satisfy every cage arithmetic target.

While learning, 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 learning, what example helps explain Calcudoku?

Here is the relevant explanation: 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?

For clarity: A correct cage total does not permit duplicate digits in a row.

While reading the Guide, 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?

The mode on this page is Solo. Same-device play uses one screen; this game library does not provide internet matchmaking.

On this playing page, where should I start with Calcudoku?

Select a square and enter 1–4.

When I return, 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.