Notice: You must have an Apple Watch to play this game.

Now the famous eight puzzle game comes to Apple Watch with two modes -- classic digit mode and funny jigsaw mode to kill your leisure time and challenge your intelligence.

• Two modes: Digit Mode and Jigsaw Mode
• Jigsaw Mode has 40 handpicked images, including plants, girls, animals and more!
• Challenging, fast-paced and fun!

The eight puzzle is a smaller version of the fifteen puzzle, which was invented in 1874 by Noyes Palmer Chapman, a postmaster in Canastota, New York. The puzzle made its way to Hartford, Connecticut, where students in the American school of the Deaf started manufacturing the puzzle. Then the puzzle became a craze in the U.S. in February 1880.

Rules
To move: If there is an empty adjacent square next to a tile, a tile may be slid into the empty location.

To win: The tiles must be moved back into their original positions, in the Digit Mode numbered 1 through 8, in the Jigsaw mode just recover the image.

* Finding a solution for n-puzzle is easy. However, finding a shortest solution is NP-hard.