RT Icosoku logic game

The RT Icosoku is a logic puzzle for anyone who enjoys numbers, mathematical challenges or Sudoku. It tests your counting, logical and combinatorial skills. The goal is to place the 20 tiles on the ball so that the dots surrounding each yellow pin add up to the number shown on that pin.

To start, remove all 20 tiles and place the yellow pins anywhere on the ball. Then fit the tiles so that the dots around each pin sum to the number on it. The challenge lies in finding the solution through reasoning rather than trial and error.

The puzzle is designed so that any pin arrangement can be solved. If the answer is not immediately clear, simply reposition the pins and start a new challenge.