The Revoke. Should a player fail to follow suit when able to do so, it is a revoke, and the revoke is established when the trick in which it occurs is turned down and quitted by the side that won it, or when the revoking player, or his partner, in his right turn or otherwise, has led or played to the following trick. If a player ask his partner if he has none of the suit led, before the trick is turned down, the revoke may be corrected, unless the player in error replies in the negative, or has led or played to the next trick.
Dummy cannot revoke under any circumstances.
The penalty for the revoke depends on the side in error. If the declarer revokes he cannot score anything but honours as actually held, while the adversaries take 100 points penalty in the honour column, in addition to any they may be entitled to for defeating the declaration. If an adversary revokes, they score honours only, and the declarer may either take the 100 points, or he may take three actual tricks and add them to his own. If he takes the tricks, they may aid him in fulfilling his contract, as the score is then made up as the tricks lie, but the declarer will not be entitled to any bonus in case he was doubled.
Suppose Z is the declarer, and is playing three hearts doubled. He wins the odd trick only, but detects a revoke, for which he takes three tricks. This gives him four by cards, doubled, worth 64 points toward game, but he does not get any bonus for making his contract after being doubled, or for the extra tricks, because they were taken in penalty and not in play.
Exposed Cards. After the deal but before the winning declaration is settled, if any player exposes a card his partner is barred from bidding or doubling, and the card is subject to call. Should the partner of the offending player prove to be the leader to the first trick, the declarer may prohibit the initial lead of the exposed suit.
All cards exposed by the declarer’s adversaries after the original lead are liable to be called and must be left on the table, face upward. Exposed cards are those played two at a time, dropped on the table face up, or so held that the partner might see them, or cards mentioned as being in the hand of the player or his partner. The declarer is not liable to any penalty for exposed cards.
Leading Out of Turn. If either adversary leads out of turn, the declarer may call the card exposed, or call a suit when it is the turn of either adversary to lead. If the declarer leads out of turn, from his own hand or dummy’s, there is no penalty, but he may not correct the error unless directed to do so by an adversary. If the second hand plays to the false lead, it must stand. If the declarer plays from his own hand or from dummy to a false lead, the trick stands. In case the dealer calls a suit and the player has none, the penalty is paid.
Cards Played in Error. If any player but dummy omits to play to a trick, and does not correct the error until he has played to the next trick, the other side may claim a new deal. If the deal stands, the surplus card at the end is supposed to belong to the short trick, but is not a revoke.
OBJECT OF THE GAME. The object in auction is for the declarer to fulfil his contract, and for the adversaries to defeat it. The highest card played to the trick, if of the suit led, wins the trick, and trumps win all other suits. At the end of the hand the declarer counts up the tricks he has won over the book and if he has made good on his contract he scores the value of those tricks toward game. As soon as either side reaches 30, it is a game, but the hands are played out, and all the tricks counted.
RUBBERS. Three games, 30 points or more each, make a rubber, but if the first two are won by the same partners the third game is not played. The side that first wins two games adds 250 rubber points to its score.