THE SHIFT
Holding six or more of a suit, headed by Ace, King, Queen, some writers have very properly called it an Auction "crime" to double. The question arises, however, "What should the Second Hand do under such circumstances?" A bid of two in his solid suit will eliminate any chance of the No-trump being continued, and an adverse call of two No-trumps is just what the holder of the solid suit most desires, as he can double with comparative safety, being assured both of the success of the double and of the improbability that the Declarer will be able to take himself out.
There has been suggested to meet this emergency a declaration called the "Shift." It consists in bidding two of a suit in which the Declarer has little or no strength. For this purpose a suit of lower value than the solid suit, should, if possible, be selected. The theory of the bid is that either the original No-trump declarer or his partner, having the suit securely stopped, will bid two No-trumps and that the double can then be effectively produced. The advocates of the Shift urge that should the worst happen, and the declaration be doubled, the player making it can then shift (this situation giving the declaration its name) to his real suit, and that no harm will ensue.
The trouble is that a double under such circumstances is not the worst that can happen. When the Shift was first suggested, players were not familiar with nor on the lookout for it. Success, or at least the absence of failure, therefore, often attended its use. Now, however, it is generally understood, and players will not either overbid or double a declarer they suspect of it. They merely allow him to meet his doom attempting, with weak Trumps, to win eight tricks against an adverse No-trumper.
While, therefore, at long intervals and under advantageous circumstances, the Shift may be successfully utilized, against experienced players it is a dangerous expedient, especially for any one known to be fond of that character of declaration.
The conservative and safe course to follow with a holding of the character described is to pass the one No-trump.
WHEN TO BID TWO NO-TRUMPS OVER ONE NO-TRUMP
The bid of two No-trumps over one No-trump is a more or less spectacular performance, that appeals to those fond of the theatrical. There are some hands that justify it, but it is safe to say that in actual play it is tried far more frequently than Second Hand holdings warrant.
Such a bid may be made with a strong suit—not of great length—and the three other suits safely stopped, with the four suits stopped twice, with a long solid Club or Diamond suit and two other suits stopped, or with some similar, and, under the circumstances, equally unusual combination.
HOW TO BID AGAINST TWO OR THREE SPADES