Duplicate Poker is legal in most of the States because it is regarded as a skill game. The concept of of the game is simple - the objective of the game is to win more chips than your opponent. After certain hands, your performance will be compared against other players whom are dealt with the same cards as you. If you perform better than the others - even if you lose chips - you will still win money out of it. It maintained most crucial aspects of Texas Hold'em while avoiding the gambling aspect of it. The overall game play is slow compare to other mainstream poker sites and the player base are very small, making it difficult to find a game.