[Venom]

In the process of reviewing system notes of three of the top pairs in the USA (R-M, G-H, G-M) I noticed that each play a similar set of responses by opener after the bidding has gone 1M - 2m - ?: I particularly noticed that they played a rebid of 2M as showing more types of hands than simply showing a re-biddable/ 6-card major. In 2 of the cases, there was reference to 2M as showing some sort of "balanced" hand although some 54 & 5431 & (maybe)5440 hands seemed to be included in the 2M rebid. This is all well and good but it started me to wonder whether I am falling behind the times (Again) bidding-wise, and that this might be a good topic to survey. It was interesting to me to note that the structures were similar seeing how two of the systems are Precision-based and one is 2/1-based.

So, I am wondering what rebid structures you all play after 1 - 2m - ? with particular attention to the 2M rebid.

As always, thank you in advance.

Best wishes: DHL aka Double !

[kenrexford]

Depends.

If the minor is clubs (1♠-P-2♣ or 1♥-P-2♣), then:

2M = 6+ pure
2♦ = might be diamonds or might be waiting and balanced

If the minor is diamonds (1♠-P-2♦ or 1♥-P-2♦), then obviously a relay of 2♦ is unavailable, as this would be insufficient.

When spades were opened, Opener has six spades to rebid them without problem. If he has only five spades, and not four hearts, then he has at least 5 cards in the minors. With many hands he raises diamonds, and he might rebid 3♣ (better if 3♣ shows extras because of Roman 2♠ being used, but that's another story), but 2NT often is the call. In a pinch, 2♥ on a three-bagger is possible. I would rather bid 2♥ with three than 2♠ with 5, but that's likely deemed odd. The only instance of this might be 5-3-1-4 shape with a dead minimum and no Roman 2♠.

When hearts are opened, the same basic analysis applies, because I do not require extras to rebid 2♠. Again, five hearts is disliked and 2♠ is possible with 3514 and minimum.

[Hanoi5]

I think any system has at some point or another what is called a 'catch-all' bid which is a bid used for hard to describe hands. In 2/1 rebidding one's Major can work as a catch-all. 2NT can also serve this purpose.

[the hog]

2M shows a minimum, denies 4D if the bid was 2C, and can be 6 cards.

[mike777]

Chip Martel convention.
(Chip did not invent it, just my pet name)


He is on USA1



he plays:

1M=2R=2M=default minimum

1M=2c
2d=toy

2M or 5-(332) MINIMUM AND A 2M REBID SHOWS DIAMONDS( 5-4,5-5 OR 6-4 WITH EXTRAS)


1m=2C
2D=2H(ASKS)

THERE IS ALOT MORE DETAIL.


I only add this is his fav. convention the last tenyears.

I posted the details inthe forums a while ago.

[gordontd]

One approach:

1M-2m-2NT shows 6+ in the major
1M-2m-2M shows a five-card major, either balanced or minimum unbalanced
Reverses & high-reverses are natural and show extras

[Free]

My agreements over 1M-2m are:
step 1 = min without 4OM
step 2 = 4OM
step 3+ = max without 4OM (artificial continuations)

So:
1♥-2♣-2♥ shows 4(+)♠
1♥-2♦-2♥ shows min without 4♠
1♠-2♣-2♠ shows max with 4+♦
1♠-2♦-2♠ shows 4+♥

[Lurpoa]

Venom, on 2011-October-19, 14:56, said:

In the process of reviewing system notes of three of the top pairs in the USA (R-M, G-H, G-M) I noticed that each play a similar set of responses by opener after the bidding has gone 1M - 2m - ?: I particularly noticed that they played a rebid of 2M as showing more types of hands than simply showing a re-biddable/ 6-card major. In 2 of the cases, there was reference to 2M as showing some sort of "balanced" hand although some 54 & 5431 & (maybe)5440 hands seemed to be included in the 2M rebid. This is all well and good but it started me to wonder whether I am falling behind the times (Again) bidding-wise, and that this might be a good topic to survey. It was interesting to me to note that the structures were similar seeing how two of the systems are Precision-based and one is 2/1-based.

So, I am wondering what rebid structures you all play after 1 - 2m - ? with particular attention to the 2M rebid.

As always, thank you in advance.

Best wishes: DHL aka Double !

♥♥♥

Yes, indeed, a worthwhile discussion.

And you certainly you should have agreed on the continuations with your partner.
Note that most of the better system descriptions are giving good advice on this (cfr SAY or BWS2001)


♥♥♥

[FrancesHinden]

You can't just look at the 2M bid in isolation, it depends what everything else means.
The main decision point is how much system you want to play. We play a lot, so we play

1♠ - 2♣ -
2♦ = diamonds or 12-14/18-19 balanced
2♥ = natural
2♠ = 6
2NT = 15-17 bal

1♠-2♦-
2♥ = nat, or 5-4(5) blacks, or 12-14/18-19 bal
2♠ = 6
2NT = 15-17 bal
3♣ = 5-5 14+
3♥ = 5-5 majors 14+

After 1♠ - 2♥ this is a very cramped auction, and 2♠ is totally artificial (an immediate raise to 3H shows about 15+, so 2S includes all minimum heart raises as well as some other hands); 2NT shows 6 spades

1♥-2♣-
2♦ = natural or balanced
2♥ = 6
2♠ = nat no extra values
2NT = 15-17

1♥-2♦-
2♥ = 4(5) clubs or 6 hearts
2♠ = nat no extra values
2NT = 15-17 balanced

The multi-way bids all have an (optional) step 1 relay

[whereagles]

I have catch-alls for both opener and responder.

Opener never goes beyond 2M unless he has extras, so 2M is the catch all and can be a mere 5332 min.
Responder can bid 2NT whenever he needs more info after a min. Then opener clarifies his 2M rebid.

Going all-out shape is a recipe for trouble. People are finally realizing that after 10 years of bad/missed slams.