Riddle

The following question was asked on this year's (2008) Orange Mathematics Olympiad.

Fit as many of the available pieces into the 7×7 grid as possible! (not overlapping, of course!) You can drag them in the middle and drop them anywhere on the page. What is the maximal number of pieces that can be fitted in?

This page was built starting with a demonstration page of Walter Zorn's LGPL licensed Javascript libraries.