How to Defend Against a 1NT Opening: Cappelletti, DONT, and Woolsey

By Tracey Bauer

Your right-hand opponent opens 1NT. If you have nothing to say, the auction is over before it started, and 1NT is exactly the kind of balanced, hard-to-read hand that's worth attacking right now, before they get comfortable. A dedicated defense against 1NT lets you compete with two-suited and one-suited hands you'd otherwise have to pass. Three of the most common methods are Cappelletti, DONT, and Woolsey. Here's how each one works.

Cappelletti (Hamilton)

Cappelletti is built around a relay for one-suited hands and direct bids for two-suited hands:

• Double is penalty, 15 or more HCP. Systems stay on: advancer can still use Stayman and transfers, so the doubler, the strong hand, declares.
• 2♣ shows one long suit, six cards or more, in diamonds, hearts, or spades (never clubs). Partner bids 2♦ to ask, and you name your suit, or pass if it's diamonds.
• 2♦ shows both majors, at least 5-4 either way.
• 2♥ or 2♠ shows that major, five cards or more, plus a four-card-or-longer minor. The major has to be the five-card suit; the minor can be the shorter four-card holding. A four-card major with a longer minor is not a 2♥/2♠ bid.
• 2NT shows both minors, at least 5-5.

Tracey's Tip: with a club one-suiter, six or more clubs, bid 3♣ directly. It is natural, not alerted. Going through 2♣ first gives the opponents a cheap chance to double or bid before you've even named your suit; bidding 3♣ right away takes that room away from them.

DONT (Disturb Opponents' NoTrump)

DONT leans on the double for one-suited hands and keeps two-suited hands on the two level:

• Double shows one long suit, six cards or more, eight to 14 HCP (a spade one-suiter needs 12 to 14; with a weaker spade hand, bid 2♠ directly instead). Not penalty. Partner bids 2♣ to ask, and you pass with clubs or name your real suit.
• 2♣ shows clubs plus a higher-ranking suit, at least 5-4 either way.
• 2♦ shows diamonds plus a major, at least 5-4 either way.
• 2♥ shows both majors, at least 5-4 either way.
• 2♠ shows six or more spades on its own, no second suit, 8 to 11 HCP. With the same suit and 12 to 14, double first, then bid spades.
• 2NT shows both minors, at least 5-5. Advancer bids the longer minor, or 3♣ over an equal 5-5.

Woolsey

Woolsey's signature is a double whose meaning depends on the opponents' 1NT range, weak versus strong:

• Double, over a weak 1NT, is a straight penalty double, 15 or more HCP, and systems stay on: Stayman and transfers still work for advancer, keeping you as declarer.
• Double, over a strong 1NT, shows exactly four cards in one major (three or fewer in the other) plus five or more cards in a minor.
• 2♣ shows both majors, at least 4-4.
• 2♦ shows one major, six cards or more, with no second four-card suit.
• 2♥ or 2♠ shows that major, five cards or more, plus a four-card-or-longer minor, the same shape as Cappelletti's 2♥/2♠.
• 2NT shows both minors, at least 5-5.

A long minor on its own with no four-card major stays a pass in Woolsey; there's no dedicated minor-suit overcall.

Which One Should You Play?

All three are playable, and different clubs and partnerships land on different ones for their own reasons. If you're picking one with a new partner, start with Cappelletti. Its relay and its major-plus-minor bids are easy to remember under pressure, and the direct 3♣ tip keeps a strong club hand from ever going through that relay in the first place. Whichever you choose, agree on it explicitly before you sit down, write it on your convention card, and alert the calls that need it.

Frequently Asked Questions

What's the difference between Cappelletti and Woolsey?
The biggest difference is the double: Cappelletti's double is penalty, 15 or more HCP, while Woolsey's double is penalty over a weak 1NT and shows a major-plus-minor shape over a strong 1NT. Their 2♣ bids differ too: Cappelletti's 2♣ is a one-suiter relay, while Woolsey's 2♣ shows both majors.

Is DONT's double the same as a penalty double?
No. DONT's double shows a single long suit, six or more cards, and is not penalty. Partner bids 2♣ to find out which suit.

If you want all three side by side with real hands, the Bridge Unleashed Defend Against 1NT workshop walks through DONT, Cappelletti, and Woolsey together, then gives you a full Play of the Hand session to practice the calls at the table. Your $25 ticket includes both sessions’ recordings, a workbook, and PBN practice hands.

Pick one, agree it with your partner, and the next 1NT you hear across the table stops being a wall and starts being an invitation.