It's based on duplicate bridge for those of you familiar with the game of bridge.
Each table (let's say 5 tables) have the exact same cards dealt. You, in first position would have the same cards as the person playing first position at each table. Same for all other positions at the table. Next hand cards are changed so you have BB cards for the next game, then SB cards, Dealer button cards and so on.
At the end of the tourny, the player that played the cards best will have more chips than others.
It may sound complicated but it really isn't and allows for playing for money as this is a game of SKILL. Each player will play the same cards differently. Is your strategy better than others?