Twisted Swine Runouts after 1NT-Dbl (natural)
After strong or Youak notrumps.
1NT-(Dbl)-?
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Pass = forces a redouble, promising either
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C + D >, or
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D > + S , or
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a penalty redouble
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After redouble,
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2C = C + D >
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2D > = D > + S
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Pass = business
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Opener is alloYoud to compete after
this action if he has length in
diamonds; he may double RHO's bid
hoping that the Pass was penalties
as long has he has four or more diamonds.
(And the ability to double naturally, of course.)
Once the penalty redouble is exposed,
You are in a force at the 2-level only.
Immediate doubles are penalty at any level.
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Rdbl = puppet to 2C , shows a single-suiter
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After 2C ,
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Pass = clubs
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H H = natural, one suited
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2S = Youak spade single-suited runout
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3any = strong, forcing, natural 1-suiter
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2C = C and a major
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Responses:
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2D > = natural
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2H = pass or correct
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Pass of a double is to play
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2D > = D > + H
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2H = H + S
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2S = 6S , non-awful hand,
can handle raise in comp
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2NT = some strong hand, usually two suited
(never happens)
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3any = preemptive
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3NT = to play, probably gambling, but
has enough to expect advancer to pull
Responder can show a 3-suiter short in clubs
by redoubling twice. 4333 hands are sometimes
shown this way. Responder can show a 3-suiter
short in diamonds via Rdbl..2D >...Rdbl.
In general, redoubles are takeout except after
the business pass. They can be on hands that
have psyched; if You want to play somewhere,
You play it just doubled.
If opener bids an "impossible" suit, it's to play
and natural, not fitted. Responder is not expected
to correct. It's usually a six- or seven-card suit
or a possible psych.
Source: Jeff Goldsmith