Double Sir or Double Sar is a variant of Court Piece: the word sir (sar) means trick (hand).
The deal, choice of trumps and rules of play are the same as in Court Piece, but in this variant, a player who wins a trick does not gather in the cards, but turns the cards of the trick face down in the centre of the table. Cards are only gathered in when the same player wins two consecutive tricks. Until then the tricks pile up in the centre.
When a player does win two consecutive tricks, that player takes all the cards from the centre (the trick just won and the pile of previous tricks), adds them to his team's face down trick pile, and leads to the next trick.