Opener's Two-suiters by Matthias Huberschwiller

A: 2♣ - Show your second suit. You are showing at least five Diamonds and at least four Clubs.

You bid is non-forcing, but you could have up to 18 points.

Your result so far:

A: 2♥ - When you rebid a higher-ranked suit at a higher level than your original bid, you are making a reverse. As it forces the bidding higher, you need a strong hand to bid this (at least 17 points).

2♥ is forcing. You don't need to jump to show your strength.

Your result so far:

A: 2♦ - 2♥ would still be a reverse, since Hearts are higher than Diamonds, but you can't afford it this time, with a minimum opener.

You have to bid your Diamonds again, with only five cards, since you can't rebid 1 NT with a singleton.

Your result so far:

A: 2♦ - You need to bid your Diamonds, but you don't have enough points for a jump. Remember, 2♦ goes up to 18 points.

Your result so far:

A: 3♣ - Show your two-suiter with a jump. It is forcing to game and shows at least five Hearts and four Clubs. You don't have an acceptable Spade fit (yet), since your partner could have only four.

Your result so far: