Wrap around

Without edges you start from lamps and neighbours.

With Wrap around a pipe that leaves the board on one side comes back on the opposite side. The border rule is gone, so start with lamps side by side, and look for loops and islands sooner than usual.

How it works

Your turn

Four positions, each needing this lesson’s technique. The pinned tiles are given; turn the free ones until every lamp is lit. Click a tile to turn it, Ctrl+click to turn it back; right click or long press pins it.

Why it works

Wrap-around puzzles have no easy start, so every rule matters from the first move. You can turn the mode on for any size with the switch in the menu.