Game guide · SHOUJIKON
Killer Sudoku: rules and examples
Try Killer Sudoku at your own pace and keep its objective in view. Fill rows, columns and boxes with 1–9 once. Cage digits cannot repeat and must add to their clue. Check the relevant rule before repeating a move. Begin with the solo mode shown on the page. Keep the game area visible while you use its controls.
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.
Bring this focus to a round
After a move, check what changed. Decide which rule explains the new state before acting again. Refer to the controls when needed.
Your goal
Fill rows, columns and boxes with 1–9 once. Cage digits cannot repeat and must add to their clue. Use the instructions to see which actions move you towards it. Keep the controls in easy reach.
From the start of a round
- 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.
Choosing and moving on screen
Click or tap cells and the digit pad. Use Notes, Undo and Reveal selected. Large boards scroll inside the game. A careful first action helps you become familiar with the layout. Return to the rules if the result is unexpected.
An example before you play
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. Look for the relevant detail.
Avoid this misunderstanding
A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction. Take a moment to reassess the position before continuing. Watch the feedback after an action. A message can explain whether the input was accepted or whether a rule needs attention.
Questions that come up during play
For this browser game, what is the goal of Killer Sudoku?
Here is the relevant explanation: Fill rows, columns and boxes with 1–9 once. Cage digits cannot repeat and must add to their clue.
Before I begin, how do I control Killer Sudoku?
The key detail is this: Click or tap cells and the digit pad. Use Notes, Undo and Reveal selected. Large boards scroll inside the game.
For this browser game, what example helps explain Killer Sudoku?
The key detail is this: A two-cell cage labelled 3 holds 1 and 2; a one-cell cage fixes its own value.
For a quick reminder, what should I watch out for in Killer Sudoku?
A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction.
Before I begin, what format does Killer Sudoku offer?
Keep this in mind: 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.
Which play mode does Killer Sudoku use?
The key detail is this: The mode on this page is Solo. Same-device play uses one screen; this game library does not provide internet matchmaking.
When I return, where should I start with Killer Sudoku?
For clarity: Select an editable cell.
When I return, do I need an account or a payment for Killer Sudoku?
No player account or payment is needed. Game scores are recreational results, not cash prizes.
For my first round, how can I find Killer Sudoku again?
Keep this in mind: Use the Games list or save this game page in your browser bookmarks. The Guide is linked from the playing page.
While learning, how do I report an issue with Killer Sudoku?
Keep this in mind: Use the contact form and include the game name, browser, device and the actions that led to the issue. Do not send passwords or payment details.