Sometimes a train of logic can lead to the best defense. Use your logical thinking on this hand:
South deals, matchpoint scoring


South’s opening 1 NT is the usual 15-17 high card points. North’s 2♥️ bid is a transfer to ♠️s. Your double of 2♥️ is a request for a ♥️ lead. West, your partner, leads the 3♥️.
Think like Sherlock Holmes to find the best defense.

Ahoy from the holy land. Fascinating country and what a different culture.
Nice challenging hand.
Adding the points, E realized that W may have a J or possible a Q. Hopefully Q is D.
Lead of 3 H tells you very little an out the H count until you take the 2nd H trick. Regardless I would return a C at trick 3. Wait for declarer to play Ds.. After trumps are out and Hs are ruffed in dummy S I’d left with guessing Ds and may guess to split the points and play to the K. E must hold onto Ds to have an exit card.
If South opened 1 NT (standard) he has to have at least 2 cards in each suit – ie. diamonds. You have 5 diamonds and north has 5 diamonds. Therefore west cannot have more than one diamond. Take the first heart trick and lead the Ace of diamonds and a second diamond which west will trump. He will then return a heart for the setting trick.