kenrexford, on Jun 12 2008, 03:07 PM, said:
1. Responder cannot have xxx-KQJxxx-x-xxx. That's a 2♥ opening. Because he cannot have a 2♥ opening he must have five hearts only. With only five hearts, even with a stiff, he needs more opposite a third-seat opening. Therefore, he has Hxxxx in hearts with an outside stiff and an outside card or two. If the stiff is in diamonds, he must have an outside Queen. With an outside Queen(s), Qxxxx in hearts is not enough, so he needs the heart King. Thus, slam is a good slam if the stiff is diamonds.
Picking only your first point:
You have made a chain of assumptions, and deduced that your conclusion applied with 100% certainty. None of your separate assumptions apply with 100% certainty, so your conclusion is faulty. Here is my (top of the head) guess at the probabilities. Of course, you may reasonably differ on my percentages, they are just guesses.
- Responder cannot have xxx-KQJxxx-x-xxx. That's a 2♥ opening.
- 95% People bid differently. Perhaps OP wasn't playing weak 2s. Anyway, Mikeh just picked this as an example to show that slam needs a perfecto.
- Because he cannot have a 2♥ opening he must have five hearts only.
- 70% Jack to 6 and a four count, for example.
- With only five hearts, even with a stiff, he needs more opposite a third-seat opening.
- 50% In fact it was a 4th seat opening, but I don't understand the logic of needing more HCP to preempt opposite a 3rd seat opening anyway.
- Therefore, he has Hxxxx in hearts with an outside stiff and an outside card or two.
- 80% I agree this is likely
- If the stiff is in diamonds, he must have an outside Queen.
- 80% I agree this is likely
- With an outside Queen(s), Qxxxx in hearts is not enough, so he needs the heart King.
- 80% I agree this is likely
- Thus, slam is a good slam if the stiff is diamonds.
- 17%
Now, I am not seriously claiming that if South has a singleton diamond then slam is 17%, but trying to show that you cannot follow a long chain of reasoning where each link is uncertain, and have faith in the end of the chain.

Help
