Truesight
Do you have a true eye? Ten figures: place the midpoint, the center, the right angle, by eye. The most accurate wins.
Play your first game: your curve shows up here.
Daily challenge
Monday, November 9, 2026
The same figures for everyone. Not played yet today.
Free run
New figures every game.
No account needed: your first run gives you a guest nickname, ranked like everyone else. Create an account to keep your records on all your devices.
Leaderboards
Today
Nobody is ranked on this challenge yet today.
This week
Nobody is ranked yet this week.
Rules
Truesight measures your geometric eye. 10 figures show one after the other: on each, place a point by eye (the midpoint of a segment, the center of a circle, the fourth corner of a square, a right angle...) then validate. The right answer then shows over yours.
Your error counts as a percentage of the size of the figure (5 off the midpoint of a segment of 500 is 1%), or as an angle for the lines to draw (1 degree counts 1.7%), and 100% at most. The smallest average error wins; on a tie, the fastest.
- Daily challenge: the same figures for everyone, renewed at midnight (Paris time). Only your first run counts in the standings; the next ones are practice.
- Free run: new figures every game, your best run of the day counts.
- Leaving or reloading the page during a figure counts its full error.
- With a mouse: click to place the point, drag it to adjust. With a finger: tap to place, then slide anywhere on the figure to fine-tune it without hiding it under your finger.
- With a keyboard: the arrows move the point (Shift for a fine step), Enter validates.
Truesight: the rules in brief
Ten figures drawn one after the other: place by eye the midpoint of a segment, the center of a circle, the right angle, the parallel, the fourth corner of a square. The right answer shows over yours; the smallest average error wins.
Truesight: how to get better
- Look at the whole figure before placing: the eye compares two lengths better than it judges a position.
- For a parallel or a right angle, move your point away from the start: the guide line compares better along its whole length.