Click on a piece to move it into the empty slot. The solid
white piece is the empty slot.
Goal: Arranging the pieces so each pieces is in the correct
Hint: Order the numbers sequentially in their natural order
starting with 0 in the left upper corner and proceeding right and
down. One should do this by sliding either whole columns or whole
rows. But there is a caveat. In the original position rows and columns
rotate not just slide. This means, for example, that the first element
becomes the last when a row is rotated left.