Recenttoys 3D Brain Sport Puzzle: IcoSoKu

 IcoSoKu is an exciting number puzzle with literally thousands of challenges. 

First, place all 12 number tiles randomly on the frame. Then place the 20 game pieces marked with dots so that all the dots surrounding a number tile add up exactly to the number on the tile. To create a new challenge, simply swap some of the number tiles. A new puzzle is ready to be solved. 

Don’t forget: there is a solution for every combination of number tiles.