[gwnn]

1M-2m
3M

in 2/1 shows a solid suit, setting trumps. but maybe it lacks the ace. could it lack the king? in rkc they are equivalent. what's the rationale behind this discrimination? somebody asked me and i didnt have a good answer.

[maggieb]

If it is solid, it ain't got no holes.

Peggy and I play that it shows a solid or semi-solid suit. It could be AKQJxx, but it could also be AQJ10xxx or KQJ10xxx.

[Fluffy]

its trumps, it plays opposite a void, but it doesn't need any specific card.

AQJ10xxxx is good enough, QJ10xxxxxx is a bit extreme, but maybe possible.

[Stephen Tu]

Quote

in 2/1 shows a solid suit, setting trumps. but maybe it lacks the ace. could it lack the king? in rkc they are equivalent. what's the rationale behind this discrimination?

For the people who play that it could lack the ace, but not the K, the rationale is that if you are lacking the ace, you always have a loser opposite singleton, no particular reason to not play this suit as trumps.

But if you have the ace opposite partner's singleton, playing different suit as trumps, sometimes you can set up the suit without a loser (ruff out K, or ruffing finesse), or do a loser-on-loser play (opp lead set up one trick. If playing in major, they get in with K and cash it. If playing in partner's good suit, discard that loser while setting up the suit for rest of tricks) This can make difference between OK slam and a bad one.

Even opposite doubleton sometimes you avoid loser on 4-1 split if K onside.

Similar reasoning applies to not doing it missing Q.

[aguahombre]

We try to find fewer reasons to jump around in 2/1 auctions--assigning very narrow meanings when we do. In this case our jump rebid is solid, not either/or. And we have little to contribute outside the suit. Like a one-suit "picture bid"

that does not mean it sets trumps, It just describes.