Perimetle (GuessDash)
Two outlines, one question: which border is longer?
Every day: A daily board of seven pairs of wiggly outlines, the same for everyone and harder as it goes: pick the outline with the longer perimeter each time. New puzzle: Midnight in the Netherlands (GuessDash dates its daily boards in Europe/Amsterdam time).
Perimetle is a quick visual judgement game on GuessDash. Each round shows two irregular, computer-generated outlines side by side, and you choose the one whose perimeter is longer. The daily board has seven rounds that move from warm-ups to tricky and hard pairs.
About Perimetle (GuessDash)
Perimetle tests how well your eye can judge length along a twisting edge. In each round two outlines appear, procedurally drawn shapes with bays, spikes and wobbles, and you tap the one you think has the longer boundary. A big, smooth blob can easily have a shorter perimeter than a smaller shape with a ragged coast, which is what makes the game harder than it looks.
The daily board has seven rounds: two warm-ups, two tricky pairs and three hard ones where the difference is small. Everyone gets the same board on the same date, and after finishing you can see how you did compared with other players.
Perimetle is one of the small daily games on GuessDash, a site of estimation, geography and history puzzles. It is free and takes a couple of minutes.
It suits anyone who enjoys visual puzzles and optical illusions, and players who like geography games about coastlines and borders.
How to play Perimetle (GuessDash)
- Open Perimetle on GuessDash to start today's board.
- Look at the two outlines in the round.
- Tap the one you think has the longer perimeter.
- See whether you were right and move to the next pair.
- Finish all seven rounds and compare your result with others.
Tips
- Do not judge by area: jagged edges add a lot of length.
- Mentally trace each outline and count the deep inlets and spikes.
- Small zigzags along a long side can outweigh one big bulge.
- Take more time on the last three, hard rounds.
Questions
Is the board the same for everyone?
Yes. GuessDash publishes one board per date.
How many rounds are there?
Seven: two warm-ups, two tricky and three hard.
Does a bigger shape always have a longer perimeter?
No. A ragged smaller shape can have the longer edge.
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