Tidal Isles
Build islands with exact clue sizes, one clue per island. Islands cannot touch orthogonally. All sea must connect, and no 2×2 square may be entirely sea. Tap to cycle unknown → land → sea.
How to play & source
Build islands with exact clue sizes, one clue per island. Islands cannot touch orthogonally. All sea must connect, and no 2×2 square may be entirely sea. Tap to cycle unknown → land → sea.
Touch the tiles and controls. Keyboard: Tab, Enter or Space activate any button; arrows move in movement games. R restarts; Z undoes calm puzzles. Cell numbers are shown in each tile’s upper-left corner.
Mechanic research: Nurikabe WorldOriginal small-board interpretation, not an official port. Original code, names, layouts and CSS-drawn tiles. No external assets, trackers or network requests.
New tactical layer
The Boundary tool seals unknown shoreline around a complete one-clue island as sea. Incomplete or joined-clue islands get an explanation rather than automatic edits; live island and sea diagnostics aid deduction.