How many degrees is the shaded angle — the one the arrows sweep?
Five attempts. Your score is your closest one.
Two modes, one skill. Daily gives you an angle and asks for the number. Sweep gives you the number and asks for the angle.
Estimate the angle shown, in whole degrees. You get 6 guesses.
Measure the shaded side. Two rays always make two angles — the one inside and the one going the long way round. The shaded region is the one we're asking about, and it can be more than 180°.
After each guess you're told whether the real angle is higher or lower, plus how close you are:
Everyone in the world gets the same angle each day. It's always a whole number between 10° and 350°, never within 10° of a straight line, and it's drawn with real trigonometry.
You're given a target between 5° and 180°. An arm sweeps up from the flat baseline, left to right and back, at a steady 60° per second — stop it on the target. Click, tap the drawing, or hit space.
You get 5 attempts and your score is your closest one, so a bad start costs you nothing. Every stop stays on the board as a faint line, to aim off next time.
After each attempt you're told the warmth band and whether you went too far or stopped short — same bands as Daily. The answer itself is only drawn once the round is over.
Guess distribution
Your scores and streaks are stored in this browser and nowhere else — clearing site data resets them, and they don't follow you to another device. Two things leave, and neither carries your name, your guesses or your score. The first time you play on a given day the game requests a URL ending in /played, so we can count how many people play rather than how many open the page. When you finish a round it records that one was finished — the puzzle number, the mode, and a random id this browser keeps so a reload can’t count twice. Both happen once per day however much you play. Full privacy page
