Updated: Sep 23, 2021
West is dealer. Bid the E/W hands. Use the auto splinter.
You are West and become the declarer in 4♠. North leads the ♣10. How should you play?
Scroll down for the full hand, a suggestion/solution and/or explanation
The Entire Deal
Gino's Suggestion and a Short Explanation
Responder's 4♦ is an 'auto splinter' rebid, showing 6+ spades and a slam going hand (12+ HCP). Note that a 3♦ rebid would show diamonds and be forcing. No need to jump to show diamonds. After the splinter, opener rebids 4♠ with wasted values in diamonds.
Declaring 4♠, timing is key. Win the club and first play a diamond. Force out the ♦A to quickly discard the heart loser. Draw trump next by finessing. Prioritize discarding the heart loser.