The principal differences between Shanghai Rummy and Contract Rummy are: There are ten rounds. Shanghai Rummy is a variation of Contract Rummy. For a start, both Groups and Sequences count, and you use three decks of cards. Rules for card games, Samba is closely related to Canasta, but introduces a couple of variations that for some, make the game that much more enjoyable.Shanghai Card Game Score Sheet - studyfasr.Number cards count as 5 points each for scoring, rather than the index valueof the card.Note that a bonus subtractspoints from your score, not adds them. If you 'go out blind' (discard all your cards in one play), you earn a bonusof 25 points (50 if you haven't used a joker).There is a limit to the number of jokers used in a set or sequence.There is a limit to the number of buys allowed.Eleven cards are dealt to each player in every deal.The principaldifferences between Shanghai Rummy and Contract Rummy are: