How scoring works
What counts is not how many euros you’re off, but by what factor. Guessing €100,000 for something that costs €1M is just as far off as guessing €1 for something that costs €10.
// deviation in orders of magnitude
error = |log10(guess / actual)|
// 0 to 100 points
points = 100 × max(0, 1 − error / 2)
- · Every order of magnitude off costs 50 points. From 100× off you get 0 points.
- · Too high and too low count the same: 2× too high = 2× too low.
- · Big amounts aren’t judged more strictly than small ones.
- · Daily Challenge: 5 questions, up to 500 points. Past days are in the archive.
- · Accuracy = points scored ÷ maximum possible points.
| Factor off | Example at €1M | Points |
|---|---|---|
| exact | €1M | 100 |
| 1.3× | €800,000 or €1.25M | 95 |
| 1.5× | €666,667 or €1.5M | 91 |
| 2× | €500,000 or €2M | 85 |
| 3× | €333,333 or €3M | 76 |
| 5× | €200,000 or €5M | 65 |
| 10× | €100,000 or €10M | 50 |
| 30× | €33,333 or €30M | 26 |
| 100× | €10,000 or €100M | 0 |
About the reference values
Prices vary by country, year, spec and negotiation. That’s why every question gives a concrete context, the cost type (e.g. list price, construction cost, operating cost), a reference year and a source. Foreign currencies are converted at the annual average rate. The values are rounded orders of magnitude – which is exactly what the logarithmic scoring is made for.