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Do I have the Queen?

#1 User is offline   wyman 

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Posted 2011-July-27, 07:50


"I think maybe so and so was caught cheating but maybe I don't have the names right". Sure, and I think maybe your mother .... Oh yeah, that was someone else maybe. -- kenberg

"...we live off being battle-scarred veterans who manage to hate our opponents slightly more than we hate each other.” -- Hamman, re: Wolff
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#2 User is offline   Zelandakh 

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Posted 2011-July-27, 08:01

You need a known 10 card fit (or the queen herself) to give a positive response to a queen ask in RKCB. Your partner has shown 6+ hearts, you have 3. 9 is not enough so you can only bid 5H.
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#3 User is offline   wyman 

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Posted 2011-July-27, 08:14

View PostZelandakh, on 2011-July-27, 08:01, said:

You need a known 10 card fit (or the queen herself) to give a positive response to a queen ask in RKCB. Your partner has shown 6+ hearts, you have 3. 9 is not enough so you can only bid 5H.


Thanks. Always knew that extra length was a suitable substitute, but never knew it had to be a known 10-card fit.
"I think maybe so and so was caught cheating but maybe I don't have the names right". Sure, and I think maybe your mother .... Oh yeah, that was someone else maybe. -- kenberg

"...we live off being battle-scarred veterans who manage to hate our opponents slightly more than we hate each other.” -- Hamman, re: Wolff
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#4 User is offline   bd71 

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Posted 2011-July-27, 08:37

View Postwyman, on 2011-July-27, 08:14, said:

Thanks. Always knew that extra length was a suitable substitute, but never knew it had to be a known 10-card fit.


Don't just think of this as a rule...understand the reasoning behind it.

Because partner is asking about the queen, it's very likely partner has the K♥. By claiming the queen when you don't have it, you are suggesting that there are no trump losers.

With a 9-card fit, partner's strongest and weakest possible queenless trump holdings would give you these two situations to keep to zero losers:

KJTxxx
Axx

or

Kxxxxx
Axx


Are you confident there are no heart losers? Assuming you play for the drop, I think the probabilities of no losers will be between 41% and 53%. Not very good.

With a 10-card fit, the strongest/weakest holdings would be:

KJTxxx
Axxx

or

Kxxxxx
Axxx


Here, your odds of zero trump losers are between 78% and 89%. Very good.

On the off-chance that partner doesnt' have the K♥, the reasoning is much the same but you're thinking about your odds of holding trump losers to one rather than zero. Percentages will be slightly different, but general point will be the same.
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