Today
What's being measured?
Goal
Read the shape. Six guesses, hints reveal grid identity, then unit, then scope.
How to play
- An unlabeled heatmap. The darker the cell, the smaller the value.
- Each wrong guess unlocks a hint: grid identity → unit → time window → scope → source.
- Spelling is forgiving — common aliases work.
- The shape of the data is usually the giveaway. Rush hour, weekends, late-night — each leaves a different print.