How to Play Killer Sudoku

THE PLAYBOOK · PT-BUS

How to play Killer Sudoku

Use PT-BUS to play Killer Sudoku and read its instructions on the same page. Fill rows, columns and boxes with 1–9 once. Cage digits cannot repeat and must add to their clue. Follow the one decision at a time approach for your next round.

8 finite checked puzzles, with local saved progress. No claim of unlimited daily puzzles or calibrated difficulty.

One decision at a time

Focus on the next valid action. After taking it, check how the position or game state changed before making another choice.

Your goal

Fill rows, columns and boxes with 1–9 once. Cage digits cannot repeat and must add to their clue.

Step by step

1. Select an editable cell.
2. Enter a value using the keypad or keyboard; Notes stores candidates.
3. Read the region, cage, arrow or outside clues alongside the normal constraints.
4. Check entries verifies the completed board; Undo reverses your last input.
5. 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.

A useful example

A two-cell cage labelled 3 holds 1 and 2; a one-cell cage fixes its own value.

Watch out for this

A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction.

Common questions