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Test your judgement vs three preempts


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What Richard is clearly saying, (well clear to me anyway), is that the hand you gave is huge after a X and a 5D bid, because the values you have are unexpected, but is worth a pass after an immediate 5D bid as 5D bidder is more or less bidding on you having those values.

QED

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That I understand... (but still don't see what it has to do with conditioned probabilities). I asked a few people and am now convinced pard should perhaps bid 6 on that hand.

 

Still, I don't like double + 5 because it puts a lot of pressure into a hand whose only interest in the auction is to pass as soon as possible :D

 

By the way, what do you think a direct 6 should show? 12 playing tricks?

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Whose expected strenght?

The following example is dramatically over simplified, however, consider the following:

 

Assume that the preemptor has 10 HCP for his opening bid.

 

In the first example (a direct 5D bid), the hand making the 5D overcall should have approximately 17 HCP. In this case, there are a total of 13 HCP left in the deck. Responder is expected to have ~7. In turn, this means that

 

QJxx

xx

xxx

Axxx

 

is fairly "normal"

 

However, if the sequence starts with a double, followed by a 5D rebid, the doubler promises a significantly stronger hand. Lets assume that doubler needs at least 22 HCP for this sequence. In this case, there are 8 HCP left in the deck and your hand becomes significantly stronger than expected...

 

The underlying principle here is that your expected strength is conditional on partner's expected strength. The stronger that partner is, the weaker the expected value of your hand...

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