gnasher, on Feb 23 2009, 06:08 PM, said:
I don't really understand a style where 6♣ shows ♣K, a card which I already knew partner had, and which partner already knew I knew he had. Nor do I think that bidding or bypassing 6♦ asks partner for a card that I have already announced is in my hand.
If I were writing the explanations, 6♣ would show ♣Q, and any diamond bids would relate to the 3rd round of diamonds.
If I now bid 6♦, that should show ♦KQ. It's hard to construct a hand where I have that and don't bid a grand slam. Perhaps something like KQx Axx KQxx Axx, fishing for a black-suit jack, or more likely a hand where I know I'm bidding seven but I'm trying to find out if we belong in 7NT.
Similarly, if I bid 6♥, that will deny ♦Q and show ♥K. Again, that would suggest concern about fourth-round black-suit losers.
Good analysis here, as far as the club call is concerned. Personally, I would take it even further, as a 4
♣ call for me shows two of the top three clubs, known here to be KQ and known to be known by virtue of the 5NT call, as you observed. Hence, 6
♣ for me would be a trick source statement. If 4
♣ was just a control, then 6
♣ surely shows KQ, for the reasons you cite.
As for the diamond situation, however, I think you are missing the logic somewhat. Because I lack the diamond Ace but bid 5NT, partner is looking at the diamond Ace and knows that my 4
♦ call showed the diamond King. Of course, I do not have that card.
So, partner should be wildly confused at this point, unless he lacks the diamond King. If he was sitting there with the diamond Ace and King, and heard 4
♦ by me, and then 4NT, he's not paying any more attention because he knows that this sequence is impossible. So, the mere fact that his head has not exploded means that he does not have the diamond King. As to what 6
♦ shows? Got me. I suppose KQ makes sense if 4
♦ just showed the King, but these calls usually ask by asker, so I'd expect that Responder does not have the diamond Queen for this call. However, for partner, if he has the magic diamond King, how confused will he be, looking at the Ace and King but not the Queen, hearing a request for the Queen, by a partner who earlier cuebid diamonds?
Bottom line, then, is that your analysis seems dead on, but you failed to mention adequately how loud the head explosion should be.
"Gibberish in, gibberish out. A trial judge, three sets of lawyers, and now three appellate judges cannot agree on what this law means. And we ask police officers, prosecutors, defense lawyers, and citizens to enforce or abide by it? The legislature continues to write unreadable statutes. Gibberish should not be enforced as law."
-P.J. Painter.
1♠-2♦
3♣-3♠
4♣-4♦
4♠-4N
5♥-5N
6♣-?