e for a No-trump bid.

The theory upon which a player with possibly only three tricks declares
to take seven, is that a hand containing three sure tricks, benefited
by the advantage derived from having twenty-six cards played in unison,
is apt to produce one more; and until the Dummy refuse to help, he may
be figured on for average assistance. The Dealer is expecting to take
four tricks with his own hand, and if the Dummy take three (one-third
of the remaining nine), he will fulfil his contract. Even if the Dummy
fail to render the amount of aid the doctrine of chances makes
probable, the declaration is not likely to prove disastrous, as one
No-trump is rarely doubled.

It is also conventional to declare one No-trump with a five-card or
longer Club or Diamond suit,[2] headed by Ace, King, Queen, and one
other Ace. This is the only hand containing strength in but two suits
with which a No-trump should be called.

[2] With a similar suit in either Spades or Hearts, Royals or
Hearts should be the bid.

As a rule a combination of high cards massed into two suits does not
produce a No-trumper, although the same cards, divided into three
suits, may do so. For example, a hand containing Ace, Queen, Knave, in
one suit; King, Queen, Knave, in another, and the two remaining suits
unguarded, should not be bid No-trump, although the high cards are
stronger than the example given above with strength in three suits.

Admitting all the advantage of the original No-trump, even the boldest
bidders do not consider it a sound declaration with two defenseless
suits, unless one of the strong suits be established and the other
headed by an Ace. The reason for this is easily understood. When the
adversaries have a long suit of which they have all the high cards, the
chances are that it will be opened; but if not, it will soon be found
unless the Declarer can at once run a suit of considerable length. When
a suit is established by the adversaries, the Declarer is put in an
embarrassing position, and would probably have been better off playing
a Trump declaration. It is a reasonable risk to trust the partner to
stop one suit, but it is being much too sanguine to expect him to
protect two. Should he fail to have either stopped, the Declarer's loss
is so heavy that only with a long and apparently established suit and
an additional Ace is the risk justified. It is realized that the case
cited, namely, Ace, King, Queen, and two oth