Linen Sudoku

Rules

The grid as woven fabric: visible warp and weft, muted thread colours, digits that sit on the cloth rather than on a screen. The sound is a soft thump, like pressing a stamp into fabric.

• Each row, column and 3×3 box holds 1–9 exactly once — no extra rules.
• Placements are muffled — low-passed noise with almost no ring.
• A finished unit is a longer, softer press.
• Three difficulties, hints available, progress saved in this browser.

Good to know

Ordinary sudoku rules still apply underneath the variant: every row, column and 3×3 box holds 1–9 exactly once. The extra rule sits on top and is usually what breaks the puzzle open.

More sudoku

All sudoku variants ↗

Or read how to play Sudoku ↗.