Double Some 'R' Set is a trick-taking game that uses a unique deck of 50 cards. The card suits are fractions (ex. 1/2, 10/12, 5/6, 3/8, etc.) with the mid-cards (6/12, 5/10) also being worth extra points.
Double Some'R'Set is best played with partners (like in Spades).
The object is to bid on how many points you and your partner will take. There are 24 available points, 12 from the available tricks and 12 from available points.
Bidding goes around the table once where the players bid for the two card blind. High bid takes the blind and decides which suit (fraction set) will be trump.
Like in many trick taking games, and if you make your hand, you get the points. If you do not, you are set, hence the name (as they say in the rules) Some "r" set.
See also:
Some'R'Set - 28 card version