The Responsive Double

Doubling a raised suit for penalty rarely pays, because the opponents have found a fit. Most pairs give that double a different job. West opens 1♥, partner makes a takeout double, and East raises to 2♥. You hold four clubs, four diamonds and 8 points. You want to compete, but bidding 3♣ or 3♦ is a coin flip, since partner may have four of one and three of the other. The responsive double in bridge turns your double into a takeout call that shows both unbid suits and lets the doubler choose.

The responsive double applies when partner has made a takeout double or an overcall, and the opponents have bid and raised the same suit. A double by the fourth player in that position shows values to compete and length in the unbid suits, without a clear preference. The doubler picks the suit.

Over a raised major the double shows both minors, because with the other major advancer simply bids it. Over a raised minor the double shows both majors, usually of equal length, so the doubler never has to guess.

Shape

Use it when you hold the two unbid suits with no clear choice between them. If one suit is clearly longer, bid it. After a raised major, bid the unbid major naturally if you hold it. The double is for the hand where any single bid would be a guess.

Strength

The double shows enough to compete at the level you are forcing partner to bid. At the two level, about 7 or 8 points is enough. At the three level, aim for 9 or more, since the doubler may be minimum. A stronger hand doubles first and then bids again, or cue bids the opponents' suit if it wants to force.

How high it applies

Agree a ceiling. A common agreement is through 3♠, and some partnerships play responsive doubles up to 4♦. Above the agreed level, a double by advancer is for penalty.

The same idea works when partner has overcalled. After (1♣) - 1♥ - (2♣), a double by advancer shows the two unbid suits, here spades and diamonds, with some tolerance for partner's hearts. Advancer may hold a good hand with no fit, or a hand that wants to compete in a suit partner has not bid. Advancer with a real heart fit simply raises. Partnerships differ on the exact meaning here. Some play that the double promises four cards in the unbid major, as a negative double does.

Without the double, South's choices are a guess at the three level or a pass that lets the opponents play 2♥. The responsive double lets North choose the minor, knowing that South holds both.

• Taking it as a penalty double. The opponents have bid and raised a suit. A double at that point is for takeout unless above the agreed level.
• Doubling with a clear suit. With five diamonds and three clubs, bid 3♦. Save the double for hands without a preference.
• Doubling with the unbid major after a major raise. After (1♥) - Dbl - (2♥), bid 2♠ with four spades. The double shows the minors.
• Doubling a minor raise with unequal majors. After (1♦) - Dbl - (2♦), bid 2♥ or 2♠ with a clear preference and double only with equal length.

Responsive doubles complement two related tools. The takeout double starts the auction, and the negative double is the same idea on the opening side. In the direct seat, a two-suited hand can use the Michaels cue bid to show both suits at once.

What is a responsive double in bridge?

It is a double by the partner of a takeout doubler or overcaller after the opponents bid and raise the same suit. It shows the unbid suits and values to compete, and asks partner to choose.

What does a responsive double show over a major-suit raise?

Both minors. With the other major, advancer would bid it naturally.

What does a responsive double show over a minor-suit raise?

Both majors, usually of equal length. With one major clearly longer, advancer bids it.

How high do responsive doubles apply?

It is a partnership agreement. Through 3♠ is common, and some pairs play them up to 4♦.

Is a responsive double the same as a negative double?

They work the same way but on different sides. The negative double is made by the opening side after an overcall. The responsive double is made by the defending side after the opponents raise.