Opener's 2nd bid after a 2♦ or (♥) response (2/1)

2 ♦ (or 2 ♥) response to a 1 in a major opening
After a 1 in a Major opening (in 1st or in 2nd position and with no overcall, otherwise, there is no 2/1 GF.) and a 2♦ (or 2♥) response, the bidding is now game forcing. What does the 2♦ (or 2♥) response show:

1-It is basically Natural but, in practice it indicates that ♣ is the longest suit.. but may have only 4 cards in ♦ (but promises 5 in CO!)

2- It shows 'opening values' given his combination of HCP and shape (and its expected fit withj yours), your partner expects there will be at least a game

The opener's initially focuses on showing his shape. The responder will then be well-placed to direct the partnership to the best contract.
The priority is to decide on the suit for the final contract.

1 ♥ opener's 2nd bid after a 2 ♦ response.
Opener bids NATURALLY. If opener has a second suit (of 4 or more cards), he bids it. If he is flat, he bids NT. If he has 6+ cards in the major opened, he repeats it. No jumping... see exceptions later

2- 2♥ Natural, 6+ ♥ (any strength)

2- 2♠ Natural, 5+ ♥ and 4+ ♠ (any strength)

3- 2NT

Natural, 5 and 3-3-2 in the other suits (mini: 12-14 or maxi 18-19HCP)

2- 3♣ Natural, 5+ ♥ and 4+ ♣ (any strength)

2- 3♦ Natural, 5+ ♥ and 4+ ♦ (any strength)

Most of the time, there’s no need to jump, since the partnership is already forced to game.
If required, the options are

1-Jump rebid the opening suit (1♥ 2♦ 3♥)showing a "solid" 6+ card suit. This means that opposite a void, the suit can be expected to run.

2- Splinter bids (1♥ 2♦ 4♣ or 1♥ 2♦ 3♠) Showing 5♥, 4+♦ and a short in the suit bid

2- Jumps in NT (1♥ 2♦ 3NT) Natural, 3532 or 4531 with a 2nd zone hand (15-17HCP)

1 ♠ opener's 2nd bid after a 2 ♦ response.
Opener bids NATURALLY. If opener has a second suit (of 4 or more cards), he bids it. If he is flat, he bids NT. If he has 6+ cards in the major opened, he repeats it. No jumping... see exceptions later

2- 2♥ Natural, 5+♠ and 4+ ♥ (any strength)

2- 2♠ Natural, 6+ ♠ (any strength)

3- 2NT

Natural, 5 and 3-3-2 in the other suits (mini: 12-14 or maxi 18-19HCP)

2- 3♣ Natural, 5+ ♠ and 4+ ♣ (any strength)

2- 3♦ Natural, 5+ ♠ and 4+ ♦ (any strength)

Most of the time, there’s no need to jump, since the partnership is already forced to game.
If required, the options are

1-Jump rebid the opening suit (1♠ 2♦ 3♠)showing a "solid" 6+ card suit. This means that opposite a void, the suit can be expected to run.

2- Splinter bids (1♠ 2♦ 4♣ or 1♠ 2♦ 3♠) Showing 5♥, 4+♦ and a short in the suit bid

2- Jumps in NT (1♠ 2♦ 3NT) Natural, 3532 or 4531 with a 2nd zone hand (15-17HCP)

1 ♠ opener's 2nd bid after a 2 ♥ response.
Opener bids NATURALLY... but this time he knows the responder has 5 cards in ♥ If opener has a 3 cards in ♥, he'll show the fit. If he hassecond suit (of 4 or more cards), he bids it. If he is flat, he bids NT. If he has 6+ cards in the major opened, he repeats it. No jumping... see exceptions later

2- 2♥ Natural, 5+♠ and 3+ ♥ (any strength)

2- 2♠ Natural, 6+ ♠ (any strength) and not 3+ cards in ♥

3- 2NT

Natural, 5 and 2-3-3 in the other suits (mini: 12-14 or maxi 18-19HCP)

2- 3♣ Natural, 5+ ♠ and 4+ ♣ (any strength)

2- 3♦ Natural, 5+ ♠ and 4+ ♦ (any strength)

Most of the time, there’s no need to jump, since the partnership is already forced to game.
If required, the options are

1-Jump rebid the opening suit (1♠ 2♥ 3♠)showing a "solid" 6+ card suit. This means that opposite a void, the suit can be expected to run.

2- Splinter bids (1♠ 2♥ 4♣ or 1♠ 2♥ 4♦) Showing 5♠, 4+♦ and a short in the suit bid

2- Jumps in NT (1♠ 2♦ 3NT) Natural, 3532 or 4531 with a 2nd zone hand (15-17HCP)