Jigsaw Sudoku online

Types of challenge

Sudoku
Numbers
Regions

Skills you put into practice

Logical reasoningDeduce consequences and eliminate incompatible options.
Attention to detailTrack clues and detect conflicts on the board.
Working memoryHold several clues and constraints in mind while deciding.
Spatial reasoningVisualize positions, connections and shapes before acting.

A Sudoku with irregular regions instead of rectangular boxes.

These puzzles engage different skills while you play. This does not in itself establish general cognitive improvement or replace professional care.

The challenge

A Sudoku with irregular regions instead of rectangular boxes.

How to play

Each row and column must contain every number exactly once.
Each marked irregular region must also contain every number exactly once.

Advanced strategies

Do not assume visual 3×3 boxes: trace the whole irregular region before eliminating a candidate.

History and background

We do not yet have a sufficiently verified account of this game’s origins. Rather than guess, we avoid attributing a date or creator without reliable evidence.

Tips and strategies

Before making a move, check what each rule rules out and avoid blocking options you may need later.

Frequently asked questions

Where should I begin? Do not assume visual 3×3 boxes: trace the whole irregular region before eliminating a candidate.
What makes this game different? Each marked irregular region must also contain every number exactly once.

Jigsaw Sudoku

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