Bridge Game, Bridge Lessons at RonKlingerBridge.com

Here is a revised view of the problem from Blog 6:

East dealer : North-South vulnerable

(1) Weak two, 8-11 points

West leads the 10, you discard a club from dummy and East plays the Q. You might be sorry about your jump to 4, but it’s too late to worry about that. Can you see any hope of success?

This is what I said originally:

Clearly you need to ruff the J, else they simply cash a heart when in with the A. So, ruff the J with the J, cash the A and ruff a club low. Now what?

There is only one lie of the cards that can help you, the singleton Q, about a 12% chance. Still, it is your only chance and so you continue with the K. It works. This was the complete deal:

It has since been pointed out that a slightly superior line is to finesse the Q at trick 2. If that wins, ditch the J on the A and then lead a spade. This wins if the K is onside 50% and you hold the spade losers to one (Q singleton or Q doubleton, unless you choose to play the weak 2 opener for A doubleton). This comes to a but over 25%. Had there been no weak two, you might take the club finesse and if it wins go for J to K, winning if East has A-x or A-x-x or the bare Q.

On the actual deal, the superior line fails and 6 goes two off, but in a teams setting, where making the contract is usually the primary concern, the club finesse line is better.