Limited Leads
The first thing you should decide before making an opening lead is the direction of the defense. Should you be passive, letting declarer do his own work, or is it best to be active and set about establishing tricks?
A major factor that should be taken into consideration is the auction. In general terms, when the opponents have crawled to their contract, both limiting their hands in the process, they’ll have barely enough power to succeed and may well go down if you don’t give anything away. Conversely, if they power through the bidding, with at least one of them being unlimited, there’s a good chance they have excess strength, so they’ll get home if left to their own devices and an attacking plan is often needed.
As South on these five deals select your lead then decide whether it will differ after a slightly different auction on the proceeding hand.