#1 Neither Vulnerable

 West    North  East       South
1♥           DBL     Pass       2♠
3♥           4♠        AP

West leads the ♥A and continues
with the ♥K.  What’s East’s plan?

                                                North Dummy
                                                ♠ K Q J 10
                                                ♥ Q J
                                                ♦ A K Q J
                                                ♣ 6 4 3
                        West                                        East
                        ♠                                               ♠  6 4 3
                        ♥ A                                           ♥  4
                        ♦                                               ♦  9 6 5 3 2
                        ♣                                              ♣  9 7 5 2
                                                South Declarer
                                                ♠
                                                ♥
                                                ♦
                                                ♣
 
As East, ruff partner’s ♥K at trick two and lead a club!  Those diamonds in dummy are a threatening suit!  It is vital to take club ticks before they go away on the diamonds.  When the dummy has an imposing side suit with a strong trump fit, it is usually right to play an attacking defense. 

Visit Webinars.PlayBetterBridge.com for free webinar videos called Defend These Hands with Me.  World Champion and Master Teacher Donna Compton walks you through her thought process of opening leads, passive vs aggressive defense and many “must know” defensive ideas.