Non-Transitive Grime Dice (2012)

Each player picks a dice and whoever gets the highest value wins. Seems fair, but in fact you will always be able to pick a dice with a better chance of winning-no matter which dice you friend chooses first! If you play 'best of ten rolls' you'll be the champion almost every time. The dice are not weighted, they roll perfectly fairly.

The secret lies in their unusual numbers.