How to play
Yajilin — ヤジリン — or Arrow Ring is a loop puzzle.
- Shade some empty cells black. Black cells never share an edge, though they may touch at corners.
- Draw one closed loop through the centre of every cell that is neither black nor an arrow. The loop turns only at right angles and never crosses or touches itself.
- An arrow counts the black cells in that direction, to the edge of the grid. Other arrow cells neither block that count nor add to it.
- Arrow cells are never black, and the loop cannot pass through them. Some black cells are counted by no arrow at all.
Drag from one cell to the next to draw the loop, and drag back over a line to rub it out. Tap a cell to shade it black, tap again to clear it.
The rules in full