Second bid from responder by Pedro Durão

A: 3NT - The only sensible bid. We have enough points for game and a major fit hasn't materialized. There is no practical use to support partner in diamonds and also 3♦ would be non-forcing.

Your result so far:

A: 2♣ - With enough points for game we could try 3NT, but it's better to explore the possiblity of a 5-3 fit in spades. We need to give partner the opportunity to bid again, but he can't be allowed to pass. 3♦, 3♠ and also 2NT wouldn't be forcing and he could pass.

Your result so far:

A: 3♦ - Here we also want to explore the possibility of a fit in the majors (5-3 in spades or 4-4 in hearts). So the best is a forcing bid that partner cannot pass. It must be a new minor suit, so in this case it will be in diamonds because partner opened in clubs. 3♥ would also show partner 5 spades and 4 hearts but using the New Minor Forcing (NMF) with 3♦ is definitely the best.

Your result so far:

A: 4♥ - No need to complicate the auction here. Since partner promised 18-19 points with his 2NT bid we have enough points for game and a fit is already found. Partner showed a balanced hand so he has at least 2 hearts. We should simply bid game.

Your result so far:

A: 2♦- This last one is a little bit tricky. We have 6 hearts and want to tell partner about it, but 2♥ and 3♥ are not forcing and partner can pass. 4♥ is very risky because partner may have zero cards in the suit. We need to ask partner to bid again and 2♦ is a new suit so he cannot pass. If he bid's 2♥ we bid game in hearts.
If he bids something else we repeat our hearts with 3♥ but now he knows we have more than 12 points and he needs to bid game.

Your result so far: