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Detail specifications 74OC - Level 1

Couper les communications du déclarant

A l'atout comme à SA, priver le déclarant de rentrée au mort est une manoeuvre très utile pour l'empêcher d'exploiter une couleur longue.
Exemple
Vous êtes en Sud en défense dans

In both trump contracts and no-trump contracts, denying the declarer entries to the dummy is a very useful strategy to prevent them from exploiting a long suit.
Example
You are South on defense in this 3NT contract. Your partner led the Jack of spades. You played your King, which was taken by the declarer's Ace, who then played the 10 of clubs. You took it with the Queen; what card do you play next?
SWNE
2 SA Pass 3 SA
Pass Pass Pass
 2  
10  4
 Q  
5 Spades
3 Spades
2 Spades
7 Hearts
6 Hearts
4 Hearts
King Clubs
Jack Clubs
9 Clubs
8 Clubs
5 Clubs
Queen Diamonds
7 Spades
Queen Hearts
Jack Hearts
10 Hearts
9 Hearts
5 Hearts
Ace Clubs
Jack Diamonds
9 Diamonds
6 Diamonds
5 Diamonds
Quiz Q27241
You know from the bidding that your partner is weak! He showed his only strength by playing the Jack of spades. He probably has three cards in clubs (he played the 2 in an even-odd signal), so the declarer has only two cards. By playing diamonds, you deprive him of his only entry to the dummy: he will never be able to exploit his beautiful 6-card club suit!