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WATER EDITION / VARIANT

Water Sudoku

Plain sudoku, digits dropping into still water.

Click a cell, then a digit. Arrow keys move, 1–9 place, Backspace clears.

Rules

An ordinary sudoku board rendered as a pool: cool blue, drifting surface lines, digits that land with a droplet and a short ripple. The rules are exactly the classic ones.

  • Each row, column and 3×3 box holds 1–9 exactly once — no extra rules.
  • Every placement is a droplet: a falling tone with a splash of filtered noise.
  • A finished row or box breaks the surface — a wider, lower splash.
  • 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 ↗.