What if

When no simple step helps, follow one turn a step further.

Sometimes none of the rules fixes a tile. Then pick a tile with few possible turns and imagine one of them, and follow the simple rules from it. If that leads to two lamps facing each other, a loop or an island, the turn is wrong. On this site one such step is always enough.

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

What if is the slowest technique, so keep it for when nothing else works. Hard puzzles need it a few times; the easier levels never do.