How to Play Jigsaw Sudoku

THE PLAYBOOK · IHAHOOO

How to play Jigsaw Sudoku

Read the aim of Jigsaw Sudoku, then make your first move. Fill each row, column and irregular coloured nine-cell region with 1–9 once. Check the relevant rule before repeating a move. Choose a comfortable screen position before beginning. Look at what changes after your first action.

This collection contains 6 puzzles. Progress is saved in this browser. The same puzzle can appear again; the collection is not labelled with calibrated difficulty levels.

Make the controls familiar

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 each row, column and irregular coloured nine-cell region with 1–9 once. Keep that objective in view throughout the round. Review the board or playing area as it changes.

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 careful first action helps you become familiar with the layout. A new-round button replaces the current round.

A useful example

The coloured region, not a conventional 3×3 box, defines the third no-repeat constraint. Compare this with the rule that governs the move. Look for the relevant detail.

Watch out for this

A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction. Read the feedback to see why an action did not have the expected result. Read one step at a time and try it on the playing area. Match the instruction to the control you use.

Common questions