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Jigsaw Sudoku

Einstein

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Play Einstein Jigsaw Sudoku — ThePuzzleLabs

Try this Einstein Jigsaw Sudoku puzzle on ThePuzzleLabs.

00:00
Classic

How to Play

Fill the 9×9 grid so every row, column, and irregular region contains digits 1–9. Regions are shown by color and thick borders.

👆

Click a cell to select it, then press a number 1–9 to place it.

🧩

Unlike standard Sudoku, regions are irregular shapes instead of 3×3 boxes. Each colored region must contain digits 1–9 exactly once.

✏️

Toggle Notes mode (N key) to pencil in candidates.

🔴

Conflicts are highlighted in red. A cell conflicts when the same digit appears in its row, column, or region.

💡

Use up to 3 hints. Each hint reveals a cell's value and explains the logic.

Keyboard shortcuts
Place digit1–9
EraseDelete
Notes modeN
NavigateArrow keys
Undo
Ctrl+Z
Redo
Ctrl+Y

Solve This Puzzle?

This will fill in the complete solution. The puzzle will be marked as “solved with reveal” rather than self-solved.

About einstein jigsaw sudoku

Every Einstein-level jigsaw sudoku puzzle on this site has been certified solvable through pure logic. The generator constructs a proof that a step-by-step solving path exists before accepting the puzzle. No trial-and-error, no bifurcation. This is the hardest jigsaw sudoku you'll find online. Nobody else offers a logic-guaranteed difficulty tier for irregular sudoku. If you can consistently solve these, you've mastered the format.

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