Bath coup

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The Bath coup is a coup in the game of contract bridge in which the declarer, who holds AJx(x) in a suit, ducks the left-hand opponent's lead of a king (or a queen) in that suit. [1] The coup is presumed to be named after the city of Bath in England and dates from the game of whist, the predecessor of bridge. [1]

The purpose of the Bath coup is either to gain a trick by means of a free finesse if the suit is continued or to gain a tempo because the suit may not be continued by opponents without the loss of a trick. The basic position for the Bath coup is like this diagram:

543
KQ1098W    N↑ S↓    E76
AJ2

West leads the king at a notrump contract. If South takes the trick immediately, his jack can be finessed subsequently if East gains a later trick, providing four tricks in the suit for the defense. However, if South applies the Bath coup by ducking, he will either take two tricks with AJ, or the opponents would have to regain the lead twice to cash the suit—first, East must gain the lead in order to finesse through declarer's AJ, and later, West must regain the lead to cash the suit. If the suit is divided 5–2, as in the diagram, the declarer has in effect performed a hold up with an additional gain in tempo, as the opponents have to regain the lead once each. If the suit were divided 4–3, the last lead could be gained by any opponent to cash the suit, but the number of available tricks would be smaller.

A43
KQ1098W    N↑ S↓    E76
J52

The coup also occurs when ace and jack are split, but the jack lies before KQ.

Defense

The defense can relatively easily prevent giving away the trick by free finesse by accurate signaling. The most common signaling method on partner's lead is encouraging/discouraging (high card/low card respectively). In the examples above, East would play the six (the lowest), indicating that he doesn't have the jack. However, there are situations when West may misread the signal. To overcome the situation, some players agree that throwing away the jack is mandatory when a King is led at a notrump contract; yet others play that only the lead of the queen requires the partner to drop the Jack if he has it.

However, when a Bath coup position arises, defenders can't regain the tempo. What they can do, though, is to utilize the order of their entries correctly, as in the following deal:

South in 3NT543
65
KQ3
KQJ108
KQ1098

N

W               E

S

76
A43742
1076J952
62A743
Lead KAJ2
KQJ109
A84
95

West leads K against 3NT, South executes the Bath coup by ducking, and West must switch. If he plays a red suit, declarer will play on hearts (and will have to guess the position correctly). When West takes his ace, he still cannot continue spades, and the declarer will have time to develop a club trick as his ninth (along with four heart tricks, A, and three diamonds). However, if West plays a club, the declarer is doomed: East will take his A and play a spade through, while West still has the A as an entry to good spades.

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<span class="mw-page-title-main">Contract bridge</span> Card game

Contract bridge, or simply bridge, is a trick-taking card game using a standard 52-card deck. In its basic format, it is played by four players in two competing partnerships, with partners sitting opposite each other around a table. Millions of people play bridge worldwide in clubs, tournaments, online and with friends at home, making it one of the world's most popular card games, particularly among seniors. The World Bridge Federation (WBF) is the governing body for international competitive bridge, with numerous other bodies governing it at the regional level.

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The simple squeeze is the most basic form of a squeeze in contract bridge. When declarer plays a winner in one suit, an opponent is forced to discard a stopper in one of declarer's two threat suits.

Safety play in contract bridge is a generic name for plays in which declarer maximizes the chances for fulfilling the contract by ignoring a chance for a higher score. Declarer uses safety plays to cope with potentially unfavorable layouts of the opponent's cards. In so doing, declarer attempts to ensure the contract even in worst-case scenarios, by giving up the possibility of overtricks.

In the card game of contract bridge, to hold up means to play low to a trick led by the opponents, losing it intentionally in order to sever their communication. The primary purpose is to give as many tricks to opponents as needed to exhaust all the cards in the suit from one of their hands. If that hand regains the lead, it will not be able to put the partner on lead to cash its tricks. Hold up is one of basic techniques in play.

A (bridge) signal is a move in the card game of contract bridge in which partners defending against a contract play particular cards in a manner which gives a coded meaning or signal to guide their subsequent card play. This may also be referred to as carding. Signals are usually given with the cards from the two-spot to the nine-spot. There are three types of signals:

In trick-taking games, to ruff means to play a trump card to a trick. According to the rules of most games, a player must have no cards left in the suit led in order to ruff. Since the other players are constrained to follow suit if they can, even a low trump can win a trick. In some games, like Pinochle and Preferans, the player who cannot follow suit is required to ruff. In others, like Bridge and Whist, he may instead discard. Normally, ruffing will win a trick. But it is also possible that a subsequent player will overruff. Historically, ruff meant to "rob" i.e. exchange a card with the stock.

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A compound squeeze is a type of play in the game of contract bridge. In this squeeze one opponent is squeezed such that some form of other squeeze emerges involving either or both players. Usually this term is used to reference a pentagonal squeeze. In this form of squeeze both players guard two suits, and one player guards a third suit. On the play of a card the player guarding three suits must give up one of the shared guards . Now each opponent singly guards one suit, and there is a third suit that is jointly guarded. This means that a double squeeze matrix exists. Note that there are pseudo compound squeezes, where the triply squeezed opponent can select the 'correct' shared suit, such that the entry situation precludes the proper functioning of the double squeeze.

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References

  1. 1 2 Manley, Brent; Horton, Mark; Greenberg-Yarbro, Tracey; Rigal, Barry, eds. (2011). The Official Encyclopedia of Bridge (7th ed.). Horn Lake, MS: American Contract Bridge League. p. 369. ISBN   978-0-939460-99-1.