gnasher, on Oct 7 2009, 06:41 PM, said:
I'd want to know more about the distinction between 4♠ and a cue-bid. Suppose, for example, that the division between the bids was:
- 3NT: no spade fit
- 4♠: a spade fit, but not slam-suitable
- Cue-bid: slam-suitable with a fit
I agree. We need to know what a 3NT bid would mean and how firm the partnership's agreements are in this area.
If they have specifically agreed that Opener is expected to use discretion and that 4
♠ is the medium action [a sub-optimal method, if you think about it] then probably the UI does not demonstrably suggest bidding on over passing or vice versa.
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4♠ is such a space-consuming bid that it's hard to believe than anyone would agree to bid it on as much as an ace and ♠Q. I'd need to hear some persuasive arguments that their agreements really did allow this.
It really depends on their agreements. If not sure on what hands partner might bid 4
♠, it seems percentage to bid Blackwood and bid slam opposite and ace and
♠Q. But if the partnership has agreed to play what I consider to be a superior method, 4
♠ should deny a side suit ace (else cue bid) in which case passing is the only logical alternative lest partner hold something like:
♠Qxx
♥Qx
♦QJ10xx
♣KQx
when 4
♠ could be the limit of the hand (OK, 4
♠ may not make either on a really bad day but perhaps the opponents can take only one ruff, and yes 4NT is cold but it is impossible to get there).
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Let me ask a question: does the UI suggest bidding 6♠ over 4NT?
It depends. Having established what agreements they have, I'd ask the player why (s)he bid 6
♠. If I conclude that the player inferred
only from the UI that partner must hold
♠Q and an ace, then the 6
♠ bid is illegal.
Conceivably, is pass is not a LA, we might rule no damage from failing to bid 4NT(would get to slam after 4NT-5
♦-5
♥) but assess a PP for the 6
♠ bid.
... 1NT .P. 3♠
.P. 4♠. .P. 6♠
.P. .P.. .P.
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