Jigdoku

Sudoku logic meets jigsaw instinct. Jigdoku hands you a 9×9 grid and a tray of double-sided polyominoes. Flip and fit every piece into the grid so they interlock perfectly AND the numbers obey Sudoku rules when you nail it!

How to play

• The board is a 9×9 grid. One anchor piece starts locked in place to give you a foothold.
• Each other piece is a cluster of numbered squares in the tray. Drag them all onto the grid so they both fit together perfectly AND form a valid sudoku solution.
• Some pieces are mirrored — flip them to their correct face before they'll fit.
• The finished grid follows Sudoku rules, so the numbers guide where each piece belongs.
• Place everything correctly and the board lights up — solved!

Controls

On desktop

• Drag a piece from the tray onto the board, or click to pick up and click again to drop.
• Double-click a piece to flip it. Pieces snap to the grid.

On mobile / tablet

• Best played in landscape — turn sideways (you'll see a prompt in portrait).
• Drag with your finger, or tap to pick up and tap again to place.
• Double-tap a piece to flip it.

The interface

• New puzzle — load a fresh, randomly generated board.
• Reset — send every piece back to the tray and start over.
• Hint — validate your placements (it also flags pieces on the wrong/mirrored side).
• Show solution — peek when you're stuck.
• Timer & Pause — track your solve time; pause to take a break.

Tips

• If a piece looks almost right but won't validate, try flipping it.
• Use Show solution sparingly — half the fun is the deduction!