[blml] Encrypted signals

[Jean-Pierre Rocafort]

gesta at tiscali.co.uk a écrit :
> Grattan Endicott<gesta at tiscali.co.uk
> [also grandeval at vejez.fsnet.co.uk]
> *****************************************
> "The true genius is a mind of large general 
> powers, accidentally determined to some
> particular direction."
>                       ~ Dr. Samuel Johnson.
> =====================================
> ----- Original Message ----- 
> From: "Eric Landau" <ehaa at starpower.net>
> To: "Bridge Laws Discussion List" <blml at rtflb.org>
> Sent: Friday, July 28, 2006 3:42 PM
> Subject: Re: [blml] Encrypted signals (was: nearest 
>                                   card) [SEC=UNOFFICIAL]
> 
> 
> 
>>The problem -- I believe it was Herman who first 
>>articulated it in this forum -- is that if they choose to
>>exercise that authority, they take on an obligation to 
>>define precisely what an "encrypted signal" 
>>is.  "We can't define it, but you may not do it" just 
>>doesn't cut it.  Unfortunately, that would appear to 
>>be exactly what some SOs have adopted as their 
>>stated policy.
>>
> 
> +=+ I do not consider this accurate.  The SO's, 
> through their appointed officers on site - or through
> those to whom reference is made beforehand, may 
> look at any proposed signalling method and decide 
> whether it intends to rely on a secondary key to 
> withhold from declarer access to the meaning of the 
> card played. 'Key' signifies a method of defining which 
> of alternative meanings is to be attributed. That method 
> is not the characteristic of the card but a secondary 
> circumstance, one that is obscured in principle from 
> the perception of the declarer.  
>       Encryption is a question of principle and intent. If
> the principle and intent is defined in the regulation, the 
> determination whether a particular method reflects that 
> principle and intent may follow within the announced
> procedures for systems submission and acceptance.
>                             ~ Grattan ~    +=+  
> 
it doesn't appear wbf follows this broad interpretation of what is a 
"key". maybe they restrict it to the cryptography meaning: a secret 
parameter exchanged by correspondants prior to the moment they need to 
use it for a coding/uncoding process, and which they avoid to disclose 
to other people, that is to say: a concealed agreement.
  otherwise, what would they think of this lead method:

low= even without honor or odd with honor
higher possible= odd without honor or even with honor

the intent is to keep declarer in the dark as often as possible while 
defenders can decode partner's holding.
          J102

          A65

lho leads 3, J, Q, A

Lho may have got 9743 as well as K9743. rho knows what happens in both 
cases, declarer knows lho led his lowest card but can't infer anything.

i don't know the position of wbf about this lead system but it has been 
used for a long time by italian champions nunes-fantoni without any trouble.

jpr
-- 
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Jean-Pierre Rocafort
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