How to Play
Click on a square next to the open space and it will slide into the space.
Keep it up until all the squares are in order.
It's easy to get most of the squares in order.
However, getting the last squares in place can be quite tricky.
All the games are winnable.
About the Game
This is a classic puzzle. It was invented by Noyes Chapman, the Postmaster of Canastota, New York, in 1880.