FrancesHinden, on Jun 16 2005, 09:12 AM, said:
Indeed, there is no such thing as standard.
I've never heard of this bid as pre-emptive - who exactly is it you want to pre-empt against in this auction?.
The normal meaning round 'ere is that it is strongly invitational, at least 5 cards often 6. While I would bid 2S on KQxx xx xxx Axxx, I would bid 3S on KQxxxx xx xxx Kx so it's not a difference in high cards, more a difference in hand type. Those who play 3S as pre-emptive would probably just bid game on the second hand, but having it as invitational allows you to stay out of game when it isn't making.
I do know of at least one pair who play this sequence as forcing, setting the suit bid as trumps. They claim the invitational hand is rare, the pre-empt is pointless, but that slam bidding after a take-out double is difficult and this helps.
With only 4 trumps I wouldn't make a double jump, I would cue bid on your sample hand.
The general rule in Standard American Bidding (dataing back to Culbertson's time) is that double or higher jumps in a new suit are preemptive unless the partnership defines them otherwise.
Using 3
♠ here to distinguish 4 and 5 card jump responses has merit and may be more valuable than a preempt, but it also may not be. After all, you might have a weak hand with long spades, partner might have a minimum double and opener might have a rock.
Robson Segal classify (1
♦)-X-(P) as a potentially contested auction where we must be prepared for enemy competition.
The definition of an uncontested auction is:
1) Both opponents have passed after the opening bid, or
2) One opponent has passed after the opening bid and the other has made a limit bid.
So if you have an auction of, say 1
♦-(P)-1
♠-(P) it is fairly safe to define the bidding from this point in terms of construcive efficiency rather than preparing for competition.
In the aution at hand, it is necessary to prepare for competition and preempts make sense--this doesn't necessarily mean 3S should be preemptive, you have to consider the tradeoffs, but that playing it preemptive makes sense, while playing 1
♦-(P)-1
♠-(P)-4
♣ as preemptive does not make sense.