Results from the blind tests. Peaks of the light distribution are drawn by red contours, labelled from 1 to 6. For each blind test, we report the location of each mass component by an ellipse whose semi-axis length corresponds to the errors on its location (at the 1σ confidence level). White, cyan, magenta, yellow and green ellipses correspond to the one-, two-, three-, four- and five-component mass models respectively.