THE PLAYBOOK · SZQILUFENG
Killer Sudoku: rules and examples
Use a short break to learn the rhythm of Killer Sudoku. 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. Look at what changes after your first action.
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
Locate the buttons and input area before beginning a long round. Use the on-screen labels to avoid an accidental restart. 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. Use the instructions to see which actions move you towards it. Take a moment to understand the current position.
A walkthrough of the rules
- 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.
How to interact with the game
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. Avoid pressing the same control repeatedly while a move is being processed.
Learn from a sample situation
A two-cell cage labelled 3 holds 1 and 2; a one-cell cage fixes its own value. Apply the same reasoning to the position in your own round. Notice the change in the playing area.
Watch out for this
A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction. Check the rule before repeating the action. Watch the feedback after an action. A message can explain whether the input was accepted or whether a rule needs attention.
Common questions
While reading the Guide, what is the goal of Killer Sudoku?
For clarity: Fill rows, columns and boxes with 1–9 once. Cage digits cannot repeat and must add to their clue.
For my first round, 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.
As a new player, what should I watch out for in Killer Sudoku?
The key detail is this: A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction.
While reading the Guide, what format does Killer Sudoku offer?
For clarity: 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.
Before I begin, 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.
