Convention

Negative Double

A responder double after partner opens one of a suit and the next hand overcalls, usually showing values and one or both unbid suits.

All conventionsIntermediate

Also known as: Sputnik double, Sputnik, Responder double

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Categories

Competitive BiddingDoublesConstructive Bidding

Systems

Standard AmericanTwo Over One Game ForceAcol

Last updated

2026-07-31

What is a negative double?

A negative double is a double by responder after partner opens one of a suit and the next opponent makes a suit overcall. It is not a penalty double in standard modern methods.

The bid usually shows values and interest in the unbid suits, especially an unbid major.

It normally applies only over natural suit overcalls. A double of an opponent’s 1NT overcall is penalty in most standard methods.

Responder shows hearts

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N
E
S
1
1
X
  • Double commonly shows hearts, often four or more depending on level and agreement.
  • Responder does not promise spade length; the opponents bid spades.

Why it matters

Without negative doubles, responder often has no good call when the opponent’s overcall removes the one-level response. Negative doubles keep the auction flexible and protect major-suit fits.

Opener continuations

Opener should describe naturally. Supporting responder’s implied major, rebidding a long suit, bidding notrump with a stopper, or cuebidding with extra values are common choices.

With four-card support for the implied major, opener raises at the cheapest level with a minimum; that raise does not promise extra values. A jump raise shows invitational extras, and a cuebid of the overcalled suit is the strongest move, typically forcing.

Opener raises the implied major

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1
1
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P
2
  • Opener has four hearts and a minimum; the cheapest raise shows no extra values.
  • With invitational extras, opener would jump to 3 instead.

Penalty passes and the reopening double

Because responder’s double is not penalty, responder cannot punish the overcall directly. With length and strength in the overcalled suit, responder passes instead.

Opener is expected to strive to reopen with a double when short in the overcalled suit, so responder can pass the double for penalty. With length in the overcalled suit, opener normally does not reopen with a double.

Opener reopens with a double

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1
1
P
P
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  • Responder’s pass may conceal a penalty pass with strong spades.
  • Opener, short in spades, reopens with a double; responder can pass to convert it to penalty or bid a suit.

Shape by level

At the one level, a negative double can be flexible because opener still has room to choose a strain. At higher levels, responder should have clearer shape or extra values because opener may be forced to bid at the three level.

A common strength guideline ties the double to the level it may force opener to: about 6 or more points when opener can answer at the one level, about 8 or more when opener may have to bid at the two level, and about 10 or more at the three level.

Partnerships should define the highest level where negative doubles apply. Above that level, double may become penalty or optional by agreement.

  • Over 1 - 1, a standard negative double shows at least four cards in each major. With only one four-card major, responder bids it directly; in this specific auction a 1 or 1 response is commonly allowed on a four-card suit. A method that permits the double with only one major is a nonstandard variation that must be agreed and disclosed.
  • Over 1 - 1, double usually focuses on hearts.
  • Over higher preempts, double becomes more shape-and-values dependent.

Negative double examples

Responder’s double changes meaning with the auction. Sometimes it focuses on one unbid major; sometimes it suggests both unbid suits.

The double also carries a strength inference. A direct new suit at the two level shows five or more cards and roughly the values of a two-level response, while doubling first and then bidding a suit shows a weaker hand with length.

Showing hearts after spade overcall

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1
1
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  • Double usually shows hearts in this auction.
  • Responder may have four or more hearts depending on partnership level agreements.

Both majors after a diamond overcall

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1
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  • A standard negative double shows at least four hearts and four spades in this auction.
  • Opener should avoid assuming penalty unless the partnership has that rare agreement.

Higher-level double needs values

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1
2
X
  • Responder has less room, so shape and values matter more.
  • Opener may have to bid at the three level.

Responder hand examples

The best negative doubles have enough shape to tolerate opener’s likely answers. A flat hand with no clear strain can leave the partnership guessing.

Good negative double

84
KJ76
QT83
K42
  • After partner opens 1 and right-hand opponent overcalls 1, double shows four or more hearts and enough strength for opener to answer at the two level.
  • With 9 HCP and tolerance for both minors, responder can stand any of opener’s likely continuations.

Flat hand: prefer notrump

Q84
K76
Q83
J742
  • After 1 - 1, a standard negative double promises four hearts, and this hand has only three.
  • With a spade stopper, balanced shape, and 8 HCP, a natural 1NT response is the normal action.

Double first, then bid the suit

QJT965
84
KQ5
92
  • After partner opens 1 and the next hand overcalls 2, a direct 2 would show five or more spades and roughly two-level-response values.
  • With 8 HCP, this hand doubles first and bids spades next, showing a weaker hand with long spades.

Common mistakes

  • Treating responder’s double as penalty at low levels without agreement.
  • Making a negative double with too little shape and no tolerance for likely responses.
  • Forgetting the partnership limit for how high negative doubles apply.
  • Passing out the auction as opener when short in the overcalled suit, instead of reopening with a double in case responder holds a penalty pass.

FAQ

How high do negative doubles apply?

That is a partnership agreement. Common defaults run through 2 or 3, and some pairs go higher, but the exact level must be discussed.

Does a negative double always show both unbid suits?

No. It depends on the auction. Over 1 - 1, it often focuses on hearts.

How can the partnership penalize an overcall when responder's double is not penalty?

Responder passes with a penalty-pass hand. Opener strives to reopen with a double when short in the overcalled suit, and responder converts it by passing.

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