4.3 Opener’s Rebids After a Two over One Response

West	North	East	South
	1♥	Pass	2♣
Pass	?

2♦	4+ diamonds, if 3 clubs, minimum opening bid
2♥	The catch-all bid — almost any hand unsuitable for another rebid. Note: this does not guarantee 6 hearts.
2♠	4+ spades, any strength, we do not treat this as a reverse because it is a a cheap rebid
2NT	12 - 14 HCP, balanced hand, lead values in unbid suits
3♣	4+ clubs, any strength, or 3 clubs with better than minimum opening bid
3♦	4+ clubs, small singleton diamond, slam try
3♥	6+ solid hearts, any strength, sets hearts as trump
3♠	4+ clubs, small singleton spade, slam try
3NT	18 - 19 HCP, specifically 3=5=3=2

West	North	East	South
	1♠	Pass	2♣
Pass	?

2♦	4+ diamonds, if 3 clubs, minimum opening bid
2♥	4+ hearts, may or may not have club support with any strength
2♠	The catch-all bid — almost any hand unsuitable for another rebid. Note: this does not guarantee 6 spades.
2NT	12 - 14 HCP, balanced hand, lead values in unbid suits
3♣	4+ clubs, any strength, or 3 clubs with better than minimum opening bid, denies 4 hearts
3♦	4+ clubs, small singleton diamond, slam try
3♥	4+ clubs, small singleton heart, slam try
3♠	6+ solid spades, any strength, sets spades as trump
3NT	18 - 19 HCP, specifically 3=5=3=2

West	North	East	South
	1♥	Pass	2♦
Pass	3♣

West	North	East	South
	1♠	Pass	2♥
Pass	3♣

Note: These 3♣ are considered reverses because they take so much bidding room.

Special Cue Bidding Agreements

Further Developments after the Two over One Response

The two-over one shows game forcing values, and almost always a decent 5-card suit or source of tricks. You would make a two-over-one response on a 4-card suit only if you had 16+ HCP and three-card-support, or with a 1=4=4=4 hand in response to partner’s opening 1♠.

If responder’s next action is to go back to opener’s major, this guarantees at least three card support, and asks opener to make her cheapest cue bid or else to bid 3NT to show serious interest in slam.