THE PLAYBOOK · CYZSJT
How to play Calcudoku
Calcudoku gives you a focused activity to play in your browser. Fill a 4×4 Latin square and satisfy every cage arithmetic target. Look at what changes after your first action. Compare the starting position with the example in the Guide. Look at what changes after your first action.
Twelve puzzles with addition, multiplication, subtraction and singleton cages.
Focus on one rule
Choose one rule to keep in mind for this round. Apply it consistently rather than guessing what another version might allow. Use the example to check your reasoning.
Your goal
Fill a 4×4 Latin square and satisfy every cage arithmetic target. The feedback beside the game helps you follow the round. Return to the instructions when a step is unclear.
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. Use the control method described here for this activity. Read the example below alongside these instructions.
A useful example
A two-cell 6× cage contains 2 and 3 in a 1–4 puzzle. Your next round may have a different position, so inspect it before acting. Notice the change in the playing area.
Watch out for this
A correct cage total does not permit duplicate digits in a row. Read the feedback to see why an action did not have the expected result. Watch the feedback after an action. A message can explain whether the input was accepted or whether a rule needs attention.
Common questions
Before I begin, what is the goal of Calcudoku?
For clarity: 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.
On this playing page, what example helps explain Calcudoku?
The key detail is this: 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?
The key detail is this: Twelve puzzles with addition, multiplication, subtraction and singleton cages.
When I return, 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.
