Bidding and conventions
Negative doubles
A negative double is responder's double after partner opens and the next player overcalls. It is for takeout and usually shows four cards in an unbid major. This article covers what it shows, how strong it needs to be, and the reopening double that goes with it.
The problem
Partner opens 1♣ and RHO overcalls 1♠. You hold 10 points and four hearts. What do you bid?
10 points, four hearts, four diamonds. Before the overcall you had an easy 1♥. Now no natural bid fits.
2♥ would promise five hearts and about 10 points. 1NT denies a major and lies about your spade holding. Passing gives up on a hand that might belong in game.
Without an agreement every option misdescribes you, and the situation comes up often.
The solution
Double. It shows the unbid suits, above all any unbid major, and asks partner to pick one.
| West | North | East | South |
|---|---|---|---|
| 1♣ | |||
| 1♠ | Double | Pass | 2♥ |
| Pass | Pass | Pass |
What it promises depends on which suits are still unbid:
- After a 1♠ overcall: exactly four hearts. With five hearts, bid them naturally at the two level.
- After a 1♥ overcall: exactly four spades. With five spades, bid 1♠, which is still available.
- After a minor-suit overcall: both majors, usually four-four.
How strong, and how high
Strength scales with the level, because partner may have to bid at the level you have committed them to:
- Through 2♠: about 6–9 points is enough.
- At the three level: 10+, since partner must bid at the three level or higher.
- At the four level: a good hand, and a real fit somewhere.
Partnerships also agree how high negative doubles apply. Common agreements are "through 2♠", "through 3♦", or through the four level. Above that limit, a double is penalties again. Any of these works, as long as both partners know which one they are playing.
The cost, and the reopening double
If a double of a one-level overcall is takeout, you can no longer double for penalties, and sometimes an opponent overcalls 1♠ into your five spades to the AKJ.
Partner opened 1♣, RHO overcalled 1♠. A penalty double would be ideal, but your double is now takeout.
Instead you pass and rely on partner to reopen. Opener, short in the overcalled suit, doubles again. This is a reopening double, and opener makes it because responder may be sitting there with a trap pass. Responder then passes for penalties.
| West | North | East | South |
|---|---|---|---|
| 1♣ | |||
| 1♠ | Pass | Pass | Double |
| Pass | Pass | Pass |
A partnership that plays negative doubles and doesn't reopen has given up penalty doubles and got nothing back, and the opponents can overcall freely. Opener should reopen with a double whenever short in the overcalled suit with no better call.
What opener does after a negative double
Treat it as a takeout double and bid naturally, at a level that shows your strength:
- Minimum (12–15): bid the cheapest sensible suit, or rebid your own.
- Medium (16–18): jump in partner's implied major, or jump-rebid your own suit.
- Maximum (19+): bid game, or cue-bid the opponents' suit to force.
- With length and strength in their suit: pass, converting the double to penalties. This is rare.
Common mistakes
- Doubling with five of the unbid major. Bid it. The double shows exactly four; if partner has three-card support you'll play in a 5-3 fit you would otherwise have missed.
- Doubling with no support for the other unbid suit. Partner is entitled to bid it, and you have to have somewhere to go.
- Forgetting to reopen. This one is easy to miss, because the opponents just play quietly in their overcall and you never see the penalty you gave up.