Which Suit to Lead? (No-Trump) by Matthias Huberschwiller

A: ♥2 - You want to lead one of your 4-card suits. But how can you choose between Clubs and Hearts?

Look at the bidding sequence. They did not try to find a major suit fit. They must have the minors. A Heart lead will work better.

Your result so far:

A: ♠2 - You have two 4-card majors you can lead from. You need to look at the honors you have.

Underleading Ace-fourth is a very bad idea, therefore you need to lead a small Spade.

Your result so far:

A: ♥2 - These Hearts and Spades look alike, but there's a difference: The 10 of Hearts will help you set up the suit, therefore it's better to lead Hearts.

Your result so far:

A: ♠8 - Leading a Heart into dummy's 5-card suit isn't a good idea. It's best to lead a top-of-nothing Spade, trying to find your partner's suit.

Your result so far:

A: ♠J - It's a sequence where you'd like to lead a major. You can't lead your Ace-fourth in Hearts, but a Spade looks like a safe lead.

Usually, you need three cards in No-Trumps to make a sequence, but with two touching cards and only three cards in the suit, you need to lead the top of the mini-sequence.

Your result so far: