Author: Jon Perry

Can you put these 16 numbers in order? Just move the border and slide the numbers into place. Sounds easy... but it's not.

Press Scramble to scramble the board. Press Reset to reset it. The red box forms an elastic band around the squares. It can be moved by clicking on a number. Using the left mouse button moves the top-left corner, the right button moves the bottom-right corner. Pressing either of the two arrows rotates only the outer squares of a rectangle, either clockwise or anti-clockwise. The idea is to return the grid to the reset position.