Small tests.
Transparent scores.
Each round awards 0–100 game points. Your final result is the rounded arithmetic mean of all completed rounds. The daily contains five different test types; a practice session contains three rounds of one type.
What counts as backing it up?
Your claim is a target, not an exact prediction. A result equal to or higher than your claim is a success. Choosing a modest claim does not change your skill score. Choosing a bold claim does not make the questions harder.
A fair casual challenge
The same daily date gives everyone the same tasks. The first completed result is kept on this browser. Practice is separate. Scores are computed locally: this is a friendly game, not a cheat-proof competition. Device size, display settings, input hardware and distractions may affect results.
Middle Ground
Start with 100 points and subtract 4 points for every 1% of the line’s length between your marker and the true midpoint. The result is rounded to a whole number and cannot fall below zero. The raw miss is shown too. These are game points, not a ranking against other players.
Hue Knew?
The game uses the shortest distance between your hue and the target around the color wheel. Subtract 1.5 points from 100 for each degree of hue error, round to a whole number, and stop at zero. Neighboring reds on opposite ends of the slider are correctly treated as close.
Inner Clock
Start with 100 points and subtract 1 point for each 20 milliseconds of error, whether early or late. Round to a whole number, with a minimum of zero. A 0.2-second miss earns 90 points. The result also shows actual time; this is not a scientific attention or reaction-speed assessment.
Sharp Angle
Subtract 2 points from 100 for every degree between your estimate and the actual angle, with a minimum of zero. A 5° error earns 90 points. Your estimate and the actual angle appear beside your game score, which is not a percentile or a geometry qualification.
Big Picture
Subtract 4 points from 100 for each percentage point between your guess and the actual proportion, with a minimum of zero. Guessing 60% when the answer is 50% is a 10 percentage-point miss and earns 60 game points. Percentage points describe the direct gap, not relative percentage error.
Number Keeper
You earn 100 times the share of digit positions you match correctly, rounded to a whole number. Getting four of six positions right earns 67 points. Enter the required number of digits before submitting. This is feedback on one short task, not an IQ score or a clinical memory assessment.
When the day changes
A new daily appears at 00:00 UTC. Links to past daily challenges remain playable and do not overwrite today’s result.