ShutThe20!

Modern version of the class dice, board game "shut the box"

Shut the 20! is played with four dice and tiles numbered 1-20.
At the start of the game all tiles are open and have to be closed by the player.

Each roll of dice allows a player to „shut“ any combination of free tiles
that equals the sum of the throw.

For example, if the sum of the throw is 8, the player may choose any of those combination,
as long as they are free:

* 8
* 7, 1
* 6, 2
* 5, 3
* 5, 2, 1
* 4, 3, 1

The game is over, when the player succeeds „shutting“ all the tiles or has no possible tile to shut.