[BLML] (2017) defenders prematurely detaching a card

Robert Frick rfrick at rfrick.info
Sun Apr 8 15:18:37 CEST 2012

On Sun, 08 Apr 2012 03:02:01 -0400, Sven Pran <svenpran at online.no> wrote:

> Have you by any chance noticed Law 74B3?

When I referred to the premature detachment being a breach of etiquette,  
it was a direct reference to that law.

>> Robert Frick wrote
>> Defenders should not prematurely detach cards during the play. This is  
>> not
>> just a matter of etiquette; detaching cards can convey information to
>> partner.
>> For example, partner leads a small spade against 3NT and dummy comes
>> down with Q97 of spades. With K102, the player waits to see what it  
>> played
>> from dummy; from K2, a player can detach the K.
>> It is impossible to look at every situation to see if any information is
>> transmitted.
>> If a player sometimes detaches a card prematurely and sometimes does  
>> not,
>> then the failure to prematurely detach a card also says something about
> the
>> player's hand. Again, it is impossible to examine each situation, not to
>> mention the difficulty of calling the director for a failure to detach.
>> If the player detaches a card and then replaces it and plays a different
> card,
>> that too signals something. For this, I have an example from play:
>> Declarer led a singleton diamond from dummy, RHO played low, and LHO
>> detached a card. Declarer played the king and LHO now put that card back
> in
>> her hand and replaced it with the ace. This showed that LHO had the  
>> queen.
>> A regular partner will know better than declarer what a premature
>> detachment means.
>> The amount of information conveyed is small. But it is impossible to
>> otherwise eradicate, and given that it is a breach of etiquette anyway,  
>> it
> is no
>> problem to simple make it an infraction.
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