THE PLAYBOOK · HONGRENYOU
How to play Calcudoku
Read the aim of Calcudoku, then make your first move. Fill a 4×4 Latin square and satisfy every cage arithmetic target. Use the example below to understand a decision. Make your first input carefully and watch the result. Keep the game area visible while you use its controls.
Twelve puzzles with addition, multiplication, subtraction and singleton cages.
Try a deliberate move
After a move, check what changed. Decide which rule explains the new state before acting again. Notice the feedback after each input.
Your goal
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.
Controls
Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution. Keep the playing area visible while using these controls. Return to the rules if the result is unexpected.
A useful example
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. Consider the next action carefully.
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. Before your first action, say what you are trying to achieve. Then compare the result with the goal.
Common questions
While reading the Guide, what is the goal of Calcudoku?
For clarity: Fill a 4×4 Latin square and satisfy every cage arithmetic target.
As a new player, how do I control Calcudoku?
Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution.
For this browser game, what example helps explain Calcudoku?
Here is the relevant explanation: A two-cell 6× cage contains 2 and 3 in a 1–4 puzzle.
As a new player, what should I watch out for in Calcudoku?
A correct cage total does not permit duplicate digits in a row.
While reading the Guide, what format does Calcudoku offer?
The key detail is this: Twelve puzzles with addition, multiplication, subtraction and singleton cages.
Before I begin, 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.
