Posted 2015-November-24, 08:38
First let's assume diamonds are not 5-0:
Club to the Q i) It holds: so unless West has ♣KTxx(x), we have made it, just playing a club to the 9 will do. If West does turn up with two club tricks we can try and play them for singleton heart honour, or QJ doubleton, the former probably being more likely, but I'm sure we can play some diamonds and get a count. But wait, we can always make it if West has ♣KTxx, through some sort of weird strip squeeze/guard squeeze hybrid (provided we have a count). Suppose West has something like QJTxxx Hx x KTxx, now after playing a club to the queen we can cash 5 diamonds (pitching two hearts from hand), West cannot through a heart or a club, is this would be immediately fatal, so they give up four spades. Now we cash the ♠K, pitching a club, West is forced to also pitch a club. We play ♥A, and a heart to the T. West is now endplayed. So we score: 2 spades, 2 hearts, 5 diamonds, 3 clubs. This line will also work if QJxxx Hxx x KTxx, and provided you read the cards correctly you will still make if West has fewer than 4 clubs. This is all very nice, but it would be a bit ridiculous to go down when clubs are 3-3 (and you misread the cards), just because you were trying to be flash. This amazing ending doesn't work if you concede a club earlier. So a crucial question is: what card did East play at trick 1? If they gave a clearly readable count card, you might actually consider taking this line.
ii) It loses. Presumably they will play a spade back. Now you have a choice between cashing a top club and finessing the 9, or playing for the drop, but again - why commit? Cash the ♣A and cash some diamonds. If East is 3334 then they will need to discard well (two hearts - otherwise the double squeeze is coming). If East is 3424, they are getting squeezed in the round suits. If East is 2xx4, there will be a non-simultaneous double squeeze, with hearts as the pivot suit. In short, play winners, guess the ending. But what if West turns up with 4 clubs (Why is life so hard sometimes?) now we should try for one of singleton heart honour or QJ doubleton with West.
Diamonds are 5-0 with Wast having them:
Again we start with club to the Q i) it holds. A♣ will drop the king unless it really isn't your day.
ii) It loses. Win the return, cash ♣A, finesse the 9♣, today West has a singleton heart honour.
Diamonds are 5-0 with East having them:
Club to the Q i) It holds. A♣ and a club, the layout is kind and you can make 3 club tricks. Your twelfth is coming from a red suit squeeze against East, or a double squeeze with hearts as the pivot suit.
ii) It loses. Try a line similar to the above one.
So your play changes slightly if diamonds are 5-0 (you need to be a bit more optimistic), so just cash one diamond first.