This is 15 puzzle( Sliding puzzle ) of the mascot "Gunma-chan" of Gunma Prefecture. You slide 15 panels with one missing panel on the 4x4 board, and put them in order.The three pictures of "Gunma-chan" changes. It is difficult for you at first, but if you master a solution you will solve it in 1~2 minutes.You can also select the "training mode" for mastering a solution. the mascot of Gumma Prefecture "Gunma-chan" .Gumma consent 26-060623 .