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\textit{Oh, an empty article!}   You can get started by \textbf{double clicking} this text block We need a formula that, given the distance of the player's answer  andbegin editing. You can also click  the \textbf{Insert} button below point shown, returns a score from 0  to add new block elements. Or you can \textbf{drag and drop 100 that (ideally) reflects the user's knowledge of the city.     We start with the premise that, if the user is really close to the right place, he should not be penalized a lot. In the same sense, it gets to a point that if his answer is far away or even farther way, there's little difference in his knowledge of the place. So for, example, if  an image} answer is 10 or 20 meters away from the  right onto this text. Happy writing! place, the player should get very similar scores. And if the answer is 3000 meters of 3500 meters away he should also get very similar scores. So we come up with the following sigmoid function:     \begin{equation}   $S = \frac{100}{1+\frac{x}{1000}}^4$   \end{equation}