From a Realbridge pairs eventThe makeables table state that 6 can make against any lead,
You win the heart king lead with the ace perforce and test the trumps with the ace, but South shows out! Regard this as a double dummy problem now, i.e. you may look at all 4 hands, but you must assume best defense.
You will come across many hands like this where you need to take a timeout. Plan the play.
It is OK to take a full minute or two at the table to think at this stage!
Method 1: After South shows out in trumps, you resign yourself to losing a trump and since you have contracted for a small slam, you need to make the rest. At this stage we assume the K is with North (we can see that it is) and we proceed as follows -tr 1: K led taken with the ace tr 2: A but South shows out tr 3: Q advanced - covered by K and ace wins tr 4: back to J tr 5: ruff a spade tr 6: trump to king tr 7: the 4th spade! If North ruffs higher than dummy, that will be his only trick; if he discards we ruff the spade, then get back to hand by ruffing a heart, we will then cash the trump lady and play on diamonds. North can ruff when he wishes to.
Method 2: Same as above up to trick 5.tr 6: duck a club to North! tr 7: if N plays back a trump, if N plays a heart, ruff if N plays back a diamond, win and cash the last trump and cash a trump we win, ruff a heart and cash a trump tr 9: assuming a trump came back, we then cash the last trump and South gets squeezed. He has to unguard his spade or the diamond, giving you your 12th trick. The ' last 5 cards are shown in the diagram that follows with South still to play.
TIP: Take sufficient time to plan the play. Then put your plan into action.