Progressive Fork Strip
Q 3      
-  
-  
K Q J    
8 6 5 4   K 10 2    
A   -  
-   -  
-         6 4      
A J 9 7  
J  
-  
-        
Contract is no trump.  South to lead.  Win 4 tricks.
Solution:  Start with the ♠J and play the ♠3 from North.  East cannot cover with the ♠K or else Declarer can win the next trick in the north hand and claim the rest of the tricks,  If East instead follows with the ♠2 then all Declarer has to do is play the ♠A followed by another spade and East will be forced to play a club into North.  It is therefore East's only hope to follow the first trick with the ♠10 - but declarer has a counter!  Declarer must now play the ♠A.  If East follows with the ♠2 then Declarer can throw him in with a spade and East will be forced to play a club into North.  East must therefore drop the ♠K under the ace to avoid this endplay.  Unfortunately for the Defense East's brilliant defense of following with the ♠10 and ♠K on the first two tricks is not enough.  On trick three Declarer plays the J, throwing West in.  West is now forced to play a spade into Declarer's ♠97 tenace.
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