Information on the evaluation system

In puzzle with n movable fields, points are given according to how fast correct associations are found and how many new associations are still possible: The maximum number of points possible is n (n + 1)/2. This is precisely the number of steps after which the puzzle may be resolved in any case.

On the interpretation of the number of points achieved: Draging fields randomly until the correct position has been found, yields - on the average - just half of the maximum number of points possible. A positive result has thus been achieved when you achieve considerably more than half the maximum number of points. In case your result is considerably less than half of the maximum number, you display a systematic tendency to incorrect answers (maybe on account of some misconception biasing your understanding of the subject in a systematic way).