Bluff Card Game (420,Doubt)

Bluff is a very popular Card Game, also known as "420", "I Doubt it", "Cheat", "Bullshit". The aim is to get rid of all your cards by playing them to a discard pile. Since cards are played face down, giving players the option to lie about the cards they are playing, but if the lie is exposed they must pick up the pile.

There are several rules to play this game (slightly different from each other). But for now we will follow the following rules.

1) The player starting each round can chose the rank of the current round.
2) Player can challenge only when its his/her turn.
3) A Player can challenge only the last player played before his/her turn came.
etc.

For a complete set of rules please check the rules section inside the game. Soon we will add the other rule variants of the game and user can chose which rule to play.