About Line Nurikabe
Build numbered islands inside a connected river. A straight river run of five cells is forbidden, while two-by-two pools are allowed. Use island sizes and the river limit together to decide each square.
How to play
- Goal
- Form numbered islands inside one connected river, with no straight river run of five cells.
- How it ends
- Decide every cell and satisfy every island and river rule. Mistakes can be undone.
- Record
- Each chart keeps its unassisted first-solve time. Restored attempts and later solves are practice.
- Choose River or Island, then mark each undecided square. Numbered squares stay island.
- Each island contains exactly one number and exactly that many squares joined through edges. Different islands cannot share an edge.
- Keep all river squares connected through edges. Never make five consecutive river squares in a row or column. Two-by-two river pools are allowed.
- Complete every square and satisfy all the island and river rules. Use Erase, Undo or Redo whenever you need to revise a mark.
Controls
| Input | Action |
|---|---|
| Tap / click | Choose a tool, then mark a square |
| Drag | Paint a stroke with the selected tool |
| Arrow keys | Move the focused grid cursor |
| Space / Enter | Mark the focused square |
| I / R / E | Choose Island, River or Erase while the grid has focus |
| Ctrl/Cmd+Z / Shift+Ctrl/Cmd+Z | Undo / Redo |
| N | Open Restart confirmation |
| D-pad / A | Move the gamepad cursor / mark |
| B / Start | Back / open the menu |
Good to know
Marks and Undo/Redo history are kept in this browser. Reopened unfinished attempts and later solves are practice. The first-solve clock keeps running in menus and through Restart. If saving is unavailable, you can still play unsaved practice.
