The Opener's 2nd bid after a 2/1 response (2/1)

Opener's 2nd bid after a 2/1 response.
After a 2/1 response, the responder becomes the leader for that auction, whereas, the opener’s role is typically that of a describer . After a major opening, bidding is now game forcing. The opening bid starts the description, and opener’s second bid—the rebid— provides a further opportunity to narrow down both the strength and distribution of the hand. Responder will then be well-placed to direct the partnership to the best contract.

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Problem 40024: Bid 2♦. Partner may well have a 4-card ♥ suit.

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Problem 40018: Bid 2♠. You do not have 6 cards in ♥, nor a NT hand. Show your longest minor

With a regular hand
there are 3 types of rebids after the 2/1 response:

1-2NT to is the most common , with a 5332 or 5422 shape. It shows a regular hand with either minimum (12-14HCP) or maximum (18+HCP)... with a 2nd zone hand (15-17) the opener would have bid 1NT...

2- Rebid his suit at level 2 to show a 6 carder (6322) with any strength

3- a suit shift

at minimum level with a 5422 shape.

There’s no need to jump, since the partnership is already forced to game.

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Problem E40019: Playing 2/1, when the partnership is already forced to game, reverses do not require extra strength. The 2♠ bid might uncover a ♠ fit since partner might have 5 ♣s and 4 ♠s. Even if it doesn't, it shows partner where your strength lies so he can bid 3NT.