Opening lead: A

This week's hand of the week is from a Bol's Tip by Andrew Robson:
Play a preemptor who leads his suit for a singleton trump. Usually a
preemptor has a singleton. If it's outside of trumps, he usually
leads it. If he leads his own suit instead, he probably has a
singleton trump.

On this theory, South should play West for a singleton heart. At
trick two, he leads a spade to the king, takes a diamond discard on
the king of clubs, and leads the jack of spades for a finesse. If
East covers, South wins the ace, leads one high trump and then goes
to dummy and finesses to the 9 of hearts. If East doesn't cover the
jack of spades, declarer takes a first-round finesse in hearts,
leading to the 9. South hopes West's singleton trump is not the ten!

Here's another tip for when you're on opening lead: Don't lead
unsupported aces!