THE PLAYBOOK · SJBOB
How to play Killer Sudoku
Bring your attention to one round of Killer Sudoku. Fill rows, columns and boxes with 1–9 once. Cage digits cannot repeat and must add to their clue. Keep the game area visible while you use its controls. Make your first input carefully and watch the result. Check the relevant rule before repeating a move.
This collection contains 8 puzzles. Progress is saved in this browser. The same puzzle can appear again; the collection is not labelled with calibrated difficulty levels.
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 rows, columns and boxes with 1–9 once. Cage digits cannot repeat and must add to their clue. Read that aim before choosing your first action. Review the board or playing area as it changes.
Step by step
- Select an editable cell.
- Enter a value using the keypad or keyboard; Notes stores candidates.
- Read the region, cage, arrow or outside clues alongside the normal constraints.
- Check entries verifies the completed board; Undo reverses your last input.
- New puzzle selects another included puzzle.
Controls
Click or tap cells and the digit pad. Use Notes, Undo and Reveal selected. Large boards scroll inside the game. On a smaller screen, keep the active part of the board within view. Look at the feedback after the action.
A useful example
A two-cell cage labelled 3 holds 1 and 2; a one-cell cage fixes its own value. Use the example as a guide rather than a substitute for reading your board. Choose a deliberate next step.
Watch out for this
A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction. A different version of the game may use a different rule. After a move, check what changed. Decide which rule explains the new state before acting again.
Common questions
As a new player, what is the goal of Killer Sudoku?
Fill rows, columns and boxes with 1–9 once. Cage digits cannot repeat and must add to their clue.
For a quick reminder, how do I control Killer Sudoku?
Click or tap cells and the digit pad. Use Notes, Undo and Reveal selected. Large boards scroll inside the game.
While reading the Guide, what example helps explain Killer Sudoku?
For clarity: A two-cell cage labelled 3 holds 1 and 2; a one-cell cage fixes its own value.
What should I watch out for in Killer Sudoku?
For clarity: A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction.
On this playing page, what format does Killer Sudoku offer?
The key detail is this: This collection contains 8 puzzles. Progress is saved in this browser. The same puzzle can appear again; the collection is not labelled with calibrated difficulty levels.
While learning, which play mode does Killer Sudoku use?
Here is the relevant explanation: The mode on this page is Solo. Same-device play uses one screen; this game library does not provide internet matchmaking.
