Jigsaw Sudoku

THE PLAYBOOK · CDBRM

How to play Jigsaw Sudoku

Play Jigsaw Sudoku on CDBRM, then compare your approach with the example below. Fill each row, column and irregular coloured nine-cell region with 1–9 once. The accompanying practice note focuses on one decision at a time.

6 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 each row, column and irregular coloured nine-cell region with 1–9 once.

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

The coloured region, not a conventional 3×3 box, defines the third no-repeat constraint.

Watch out for this

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

Common questions