THE PLAYBOOK · FJHONGZHI
Calcudoku: instructions and practice
Bring your attention to one round of Calcudoku. 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.
Try a more deliberate round
After a move, check what changed. Decide which rule explains the new state before acting again. Use the example to check your reasoning.
Understand the aim
Fill a 4×4 Latin square and satisfy every cage arithmetic target. The feedback beside the game helps you follow the round. Notice how the game responds to your input.
Start here and follow along
- 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. Keep the playing area visible while using these controls. Return to the rules if the result is unexpected.
One way to understand the rules
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.
Notice this detail
A correct cage total does not permit duplicate digits in a row. Take a moment to reassess the position before continuing. 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.
Questions about this game
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?
For clarity: Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution.
For my first round, what example helps explain Calcudoku?
A two-cell 6× cage contains 2 and 3 in a 1–4 puzzle.
When I return, 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?
Here is the relevant explanation: Twelve puzzles with addition, multiplication, subtraction and singleton cages.
While reading the Guide, 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.