The dealer loses three by-cards and the rubber.
BRIDGE FOR THREE PLAYERS
When the game is played by three persons the cards are cut to decide which shall have the dummy; the one cutting the lowest card has the deal and a permanent dummy during the game or the rubber, as the case may be. It is then customary for each player to have dummy in turn, during one game or rubber.
In playing rubbers, 100 points are added to the score of the winning side.
In playing games, 50 points are added to score of the winning side.
If the make is passed to dummy, four aces or three aces constitute a compulsory "no-trump" declaration; otherwise, dummy must declare the longest suit.
When there are two suits of equal length, dummy must select the suit which counts most by spots, the ace counting eleven and the other honours ten each. If the suits are still equal, dummy declares the one having the higher trick valuation.
Only one adversary, the leader, can double.
If the dealer has seen the two hands, he is not allowed to re-double.
The dummy hand is not exposed until the doubling has been settled and a card led.