You are declarer(West) - what you would play at trick one
Contract = 3NT
lead = ♠4
- ♠ KJ5
- ♥ AK52
- ♦ K2
- ♣ AJ102
Answer is ♠K
It looks like North has led a small card from an honour and it could well be the ♠Q- but can you rely on him? You need to preserve the ♠A as an entry to dummy therefore you should rise with the ♠K and immediately play the ♦K to knock out the ♦A
whilst you still have that vital ♠A entry.
Point in blue box to reveal the answer