The game has 2 players playing in rounds. In each turn, a player rolls the dice as many times as he whishes.
Each result gets added to his ROUND score. BUT, if the player rolls a 1, all of his ROUND score gets lost. After that, it's the next player's turn.
The player can choose to "Hold", which means that his ROUND score gets added to his GLOBAL score. After that player "HOLDS", it's the next player's turn.
The first player to reach 20 points on his GLOBAL score wins the game.