You are South. There are three passes to North, who opens 1♣ (don't ask me why; the system was four-card majors, strong no trump). RHO bids 2♦ (he could not open a weak 2♦ at rubber bridge, but he could and would open 3♦ on a six-card suit if he felt that he had no good reason not to). You bid 2♠ (fit-showing jumps are not allowed, even if you would make one). LHO bids 3♦, North bids 4♠, RHO and you pass in tempo, LHO passes slowly.
The lead is ♦Q. RHO is Zia, LHO is Artur Malinowski. The stakes are £30 a hundred. Now that you're not feeling any undue pressure, plan the play.
Advanced and expert players quite welcome to join in - hide your answers or not as you please. If you want to know what happens at various stages in your plan, I will tell you.

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