THE PLAYBOOK · ZOEHERO
The Calcudoku playbook
Open Calcudoku, check the instructions and begin a round. Fill a 4×4 Latin square and satisfy every cage arithmetic target. Look at what changes after your first action. Begin with the solo mode shown on the page. Use the example below to understand a decision.
Twelve puzzles with addition, multiplication, subtraction and singleton cages.
Bring this focus to a round
Locate the buttons and input area before beginning a long round. Use the on-screen labels to avoid an accidental restart. Make the next step deliberately.
The challenge in front of you
Fill a 4×4 Latin square and satisfy every cage arithmetic target. The feedback beside the game helps you follow the round. Check the rules when you are unsure.
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.
Choosing and moving on screen
Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution. A careful first action helps you become familiar with the layout. Use one clear input at a time.
An example before you play
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. Verify the rule before continuing.
Keep this in mind
A correct cage total does not permit duplicate digits in a row. Check the rule before repeating the action. When a decision goes wrong, compare it with the common mistake described below. Start again only when you intend to leave the current round.
Questions that come up during play
As a new player, what is the goal of Calcudoku?
The key detail is this: Fill a 4×4 Latin square and satisfy every cage arithmetic target.
Before I begin, 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?
Keep this in mind: 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?
Here is the relevant explanation: 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.
When I return, which play mode does Calcudoku use?
Keep this in mind: The mode on this page is Solo. Same-device play uses one screen; this game library does not provide internet matchmaking.