Leading Against Slams by Matthias Huberschwiller

A: ♦2 - Declarer will eventually be able to discard his losers on dummy's Clubs. You need to set up a trick while you still have the ♣A.

Your best shot is a Diamond.

Your result so far:

A: ♦9 - Against 6NT, you need to lead as passively as possible, to not give away the 12th trick on lead.

The safest lead here is a Diamond.

Your result so far:

A: ♣A - You have no idea what dummy has. Lead the ♣A to see dummy and find out if you have another trick.

This is especially true playing match-points, where it would be expensive not to make your ♣A.

Your result so far:

A: ♥6 - You can assume West has Diamond values for his 4♠ bid, and he thought they were bad news for a slam.

Leading the ♦A will only help declarer discard losers on dummy's Diamonds. You need to lead something else, and attacking from three small Hearts is less dangerous than leading from ♣Jxx, which could open a frozen suit if your partner has the Queen.

Your result so far:

A: ♣7 - Your partner has made a Lightner double, probably showing a side-suit void (or a sure trump trick, but then your lead doesn't matter).

Looking at your hand, the best shot is to find your partner with a Club void.

Your result so far: