Take K♠, play the 9 diamonds and run it/duck. Take spade return, cash ace club, then cash ace diamonds. If 2-2, cash diamonds and depending on the pitches, either finesse the club or establish the heart trick when someone gets squeezed to drop spade winners. In 90% of actual hands, the person with short spades will start pitching one first, to avoid pitching a heart spot card or a club. Imagine East holding 87xxx Axx xx Qxx. Running the diamonds would force 3 pitches. He can pitch 2 hearts, but what's he going to do for the 3rd pitch? Spot the anguish in their faces and -evil grin- If at this point west has already pitched a spade, a spade pitch from east basically gives you a safe make via hearts. Most defenders will do this. If it's an excellent defender who pitches a club, then too bad for you but you tried your chances. or West holding QJTxx Ax xx xxxx How is he going to find 3 discards? If he discards 2 clubs, you can basically drop the queen offside. So he probably discard 1 club, 1 heart and 1 spade. Again you get a safe make. If diamonds break badly, take the club finesse and hope for 3-3. Postponing the club finesse in this line is better as it opens up possibilities of some kind of squeeze to occur and overtricks when clubs break 4-2 for instance. There's absolutely no advantage to taking the club finesse early. You will lose 3 spade, 1 club and 1 heart for -1 anyway if it's offside. If it's onside and 3-3, you are always going to make; if it's onside and 4-2 or worse and diamonds are breaking you still make. tl;dr: maintain control of diamond suit by ducking 1 round early. If 3-1, play club 3-3, Q club onside. If 2-2, run diamonds and watch discards. Fall back on club finesse if nothing interesting happens.