1# Nurikabe23Shade cells as sea so every numbered island has the correct size.45## Rules67- The numbered cells are island clues and are always island cells.8- Each island must contain exactly one clue.9- The size of each island must match its clue value.10- Sea cells must form one orthogonally connected region.11- A 2x2 block of sea cells is not allowed.1213The puzzle is solved when every sea cell is marked and all rules hold. Any14remaining undecided non-sea cells count as island.1516## Controls1718| Key | Action |19|-----|--------|20| `Arrows` / `wasd` / `hjkl` | Move cursor |21| `x` | Set sea |22| `z` | Set island |23| `Backspace` | Clear to unknown |24| `Ctrl+H` | Toggle full help |25| `Ctrl+R` | Reset puzzle |26| `Escape` | Return to main menu |2728## Mouse2930| Action | Effect |31|--------|--------|32| Left click | Move cursor, or set sea on the current cell |33| Left drag | Paint sea from the current cell |34| Right click / drag | Set island cells |3536## Tips3738- Start with clue `1` islands; all neighbors must be sea.39- Avoid 2x2 sea early, it removes many wrong branches.40- Track unfinished islands and reserve room to reach clue size.