7x7 Square Puzzle
7x7 squares can be formed using seven different heptominoes.
In the following applet 100 solutions are provided and you can put
the given pieces togehter by drag and drop.
If the computer is forbidden to rotate or reflect the pieces the
task is rather easy, otherwise it's difficult.
In this case you can rotate or reflect a heptomino by clicking the
left or right mouse button respectively.