weejonnie, on 2014-September-24, 15:48, said:
Since we are in EBU land it would appear the best thing to do (when not clear what would happen) is to assign weighted scores in accordance with 12C1c.
Agreed.
weejonnie, on 2014-September-24, 15:48, said:
(East isn't allowed to know North is weak. He is allowed to know that there is no partnership understanding.) But we'll assume a pass.
No, I think if you decide that 2
♠ does not require an alert, East won't know whether it has an agreed meaning that doesn't require an alert, or if there's no agreement. To find that out he has to ask, and he didn't.
weejonnie, on 2014-September-24, 15:48, said:
As for South - holding at least 2nd round control in all suits he is likely to get excited and when North jumps in a forcing situation with a strong spade suit (ostensibly in Acol promising a solid suit but here it could be 7 spades to AQJT) then I think that South HAS to launch a slam enquiry - 7 spades to the AQ and the red suit aces make 7S Icy unless North is 7-2-2-2.
So we get
1 Club : 2 Spades
2 NT ; 4 Spades (strong remember)
4 NT : 5 Clubs (oops! Isn't this 0 or 3 'Aces and how can it be '0' if North is strong)
So now South has to choose between 5 Spades (pessimistically assuming 0 and waiting for North to Correct and then bid 7) or just bid 7 Spades.
North will pass 5 Spades.
Since weightings should be slightly biased against offenders
75% 7SX -3
25% 5S -1
I was thinking more in terms of 75% of 5
♠-1 and 25% of 4
♠=. I don't think the South hand is a clear slam try, but I take your point that South might not believe North could have no key cards and just bid a (grand) slam. I'm not convinced that a strong jump-shift promises a one-loser suit, although I admit it's likely.