Technical specifications

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73KA - When the opponent has a long suit - level 1 ★

L'adversaire dangereux
You are the declarer of a NT contract and you have detected, thanks to the bidding or during play, that one of the opps has a long suit that could defeat the contract or could play 'across' a suit that is not well guarded . To make your contract, you must avoid letting that 'dangerous opponent' get in hand v.
The easiest and most common technique is to direct the finesses against him, ie, to take the risk on the 'non dangerous opponent' ....If it fails, it is the riskless opponent that gets in hand. No worries !
For example.
Yu are in South, as declarer of a 4 NT contract. West leads 10 ♠ : You have 7 direct tricks and the ♦ could supply the missing tricks... Who is the dangerous opponent ?
SWNE
2NT
Pass
4NT
Pass
Pass
A
J
4
J
10
Q
10
9
Q
J
10
9
3
    
10   
    
Q
6
3
A
Q
A
K
J
4
A
8
7
2
Problem 25542 East is your dangerous opponent for the ♥, the only suit that presents a risk. You can't afford to let East in hand twice ...
 
 
East is the dangerous opponent for the ♥
Which card will you play from dummy on the lead of the 10 ♠ ?
SWNE
2NT
Pass
4NT
Pass
Pass
Pass
Pass
Pass
A
J
4
J
10
Q
10
9
Q
J
10
9
3
    
10   
    
Q
6
3
A
Q
A
K
J
4
A
8
7
2
Problem 25543 You must avoid east being in hand at all costs. Take the lead with the Ace and replay right away the Queen ♦. If East raises with the King you take it with the Ace, , if not, you duck. West cannot do anything against your Ace Queen tenace in ♥ 8
East will get in hand on the ♠ return, but you'll play the Ace ♥ and make your contract.