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Support Double - The use of a double to
show 3 or 4 card support for responder's major suit. With 2 card major
support for responder's suit, opener passes; with 3 card, responder doubles
and with 4 card major support, opener bids 2 of the major suit.
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1x - (P) - 1H - (1S);
P |
Pass shows less than 3 Hearts |
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1x - (P) - 1H - (1S);
X |
Double shows 3 card Heart support |
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1x - (P) - 1H - (1S);
2H |
2H shows 4 card Heart support |
Partnership agreements are needed for several situations, including
the maximum Support Double threshold (many play on through opponent 2S
bid):
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1H - (P) - 1S - (2x);
P/X/2S |
Many play "systems on" as
above |
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1C - (1H) - X - (2H);
P/X/2S |
While responder's double
implies 4 Spades, most play "systems off" when Responder did not bid the
major |
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1C - (P) - 1S - (1N);
P/X/2S |
Opponent makes a Sandwich
Notrump overcall, showing a weak hand with length in the unbid suits.
Many play "systems on" |
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1C - (P) - 1D - (1S);
P/X/2D |
Most play "systems off"
when responder bids a minor suit |
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1C - (1H) - 1S - (2H);
2S/X/P |
Responder's 1S
promises 5+ Spades. Partnership agreement is needed regarding
opener's Spade length. |
Also see Support Redouble, Books on
Doubles
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