Put loops on the board so that three rules are all true. That's the whole game.
Tap a square once for an X, twice for a loop, and a third time to clear it. An X is your note to yourself: "no loop here". The game can X out squares for you too: its X's are in a circle. Switch them on or off under the gear, in Automatic X's.
A region is the squares inside one thick border. Some boards ask for 2 loops in every region: a badge above the board says so.
A 1 beside a row means one loop goes in that row. A 2 means two, and a 0 means none.
Not side by side, and not corner to corner either.
Not every board is a square. Some have gaps in them. A gap is not part of the board, so no loop goes there. The dotted lines across a gap show which row or column a number counts.
Beat the clock (gold): at or under the target time.
Good timing (blue): a little over the target time.
Slow and steady (grey): well over the target time.
Hints and wrong loops add seconds to your time.
Undo takes back a move. Check tells you if anything is wrong. Both are free.
X hint and Loop hint show you the next step. Each one adds a few seconds to your time.
If something turns red, Check becomes Help me. It shows what's wrong. That adds a few seconds too.
Every puzzle has exactly one answer.
Play on your phone and your computer, with one set of results.
On your other device, open loopism.ca, tap the gear, then Your devices, then I have a code. Type:
Or point its camera here:
The code works once, for 10 minutes.
No name or email is sent. If you're offline it waits and goes when you're back. Privacy
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Hard to tell the colours apart? Tap the gear for other colour sets.
Tap once for an X, twice for a loop. Drag to X out several squares.
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