How to play
Every day there's one new challenge, the same for everyone: five rounds, one for each sense, always in the same order. Each round asks about something real and gives up to 100 points, so a perfect day scores 500.
A new challenge starts at midnight in your time zone. You get one try a day, and your progress is saved in this browser, so you can stop and come back later.
The five rounds
1CountHow many?
- How
- A picture appears for 3 seconds, only once. Then estimate how many objects there were with the slider.
- Keyboard
- Arrows ±1, Shift + arrows ±10, Enter to lock in.
- Points
- 100 points within 5% of the real number; 0 points from 2.5 times too many or too few.
2TiltWhat angle?
- How
- Drag anywhere to rotate the silhouette until it leans as much as the real thing.
- Keyboard
- Arrows ±0.5°, Shift + arrows ±5°, Enter to lock in.
- Points
- 100 points within 1°; 0 points from 20° off.
3ShadeWhat color?
- How
- Recreate the object's colour from memory with three sliders: hue, saturation and lightness.
- Keyboard
- Tab between the sliders, arrows to adjust, Enter to lock in.
- Points
- Measured as the colour difference ΔE 2000: 100 points up to 3, 0 points from 40.
4HoldHow long?
- How
- Press and hold the button for as long as the thing in question lasts, then let go. One try.
- Keyboard
- Hold the space bar.
- Points
- 100 points within 5% of the real time; 0 points from 2 times longer or shorter.
5FillHow much?
- How
- Drag up or down to fill the shape to the real share.
- Keyboard
- Arrows ±1, Shift + arrows ±10, Enter to lock in.
- Points
- 100 points within 2 percentage points; 0 points from 30 points off.
How points work
Between those two limits, points go down in a straight line. After each round you see the real value, your points and a short fact with its source and, once 20 people have played that round, how everyone guessed.
After the five rounds
Your result shows your total, the profile of your five senses and, once 20 people have played, how you did against everyone that day. Share it as text or as an image: it never gives the answers away.
Streaks, archive and practice
- Play on consecutive days to build a streak. Every 7 days in a row earn a protection that covers one missed day, up to 2 at a time.
- Archive: Missed a day? Play it in the archive. Archive days don't count for your streak.
- Practice: Practise any sense on its own, as much as you like, with rounds from past days.
- Colour-blind? Turn on colour-blind mode in the settings to skip the Shade round; your score is then out of 400.