Inverted Dice is a challenging tactic dice game for smart adults and curious children.

The game introduces a new way to look at dice rolls – a way to regard five normal six-sided dice as one big twenty-sided die (with some odd probability properties).

Normally, you would throw some dice and calculate the sum of the numbers being shown. In this game, you calculate the sum of the numbers NOT being shown.

Such a roll is called an inverted dice roll and is made with standard six-sided dice. You need five dice to play.

The structure of the game is a bit like the one in Yahtzee, with a similar score chart and three rolls (or fewer) per turn.