How to play Jigsaw Sudoku

The goal

The regions

• Instead of 3×3 boxes, the grid is split into nine irregular regions of nine cells, marked by thick borders and light shading.
• Each region works just like a Sudoku box: it holds 1 to 9 once each.
• Every puzzle has a new region layout and exactly one solution.

Playing

• Tap an empty cell, then tap a number to place it. Tapping the same number again clears the cell.
• The dark numbers are the puzzle’s clues and can’t be changed.
• The selected cell’s row, column and region are shaded, and matching numbers are highlighted.
• Each number key shows how many of that number are still to place.

Tools

• Notes: turn it on to pencil in possible numbers instead of placing them. Placing a number removes it from the notes in the same row, column and region.
• Erase clears the selected cell. Undo takes back your last change.
• Hint fills in the selected cell, or the next cell that needs one.
• A number that repeats in a row, column or region turns red, along with the number it clashes with.

Difficulty

• Easy: 36 clues, and every step is a cell with only one possible number.
• Normal: 30 clues. Sometimes a number fits only one cell in its row, column or region.
• Hard: 24 clues. You’ll need notes and a few steps of thinking ahead.
• Your best times are kept separately for each difficulty.

Keyboard

• 1–9 to place a number, the arrow keys to move, Backspace to erase, N for notes, H for a hint, and Ctrl or ⌘+Z to undo.

Questions

Strategy guides