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DONT is a convention developed by Marty Bergen which stands for "Disturbing Opponents' NoTrump". It is designed to allow any one- or two-suited overcall of a 1NT opening. It is one of many conventions for interfering over opponents' 1NT opening. This convention is alertable.

Convention Edit

After right-hand opponent opens 1NT,

Edit

DONT and Cappelletti are the two most common defenses to 1NT. They each have advantages and disadvantages. DONT gives preference to minors and gives up the strength-showing double, but gains more f

DONT is a convention developed by Marty Bergen which stands for "Disturbing Opponents' NoTrump". It is designed to allow any one- or two-suited overcall of a 1NT opening. It is one of many conventions for interfering over opponents' 1NT opening. This convention is alertable.

Convention Edit

After right-hand opponent opens 1NT,

  • Double shows a one-suited hand (6+ card suit). This bid is artificial and forcing.
    • Partner should relay 2 with most hands, and overcaller will correct to suit.
    • Other bids are natural, showing a long suit and suggesting a sign off.
  • 2 shows a two-suited hand (at least 5-4) with clubs and a higher suit.
  • 2 shows a two-suited hand with diamonds and a higher suit.
    • After 2/, partner may pass with 3-card support.
    • Without support (or with better support for all higher suits), bid the next higher suit. Overcaller will pass or correct.
  • 2 shows a two-suited hand with hearts and spades.
    • Partner may pass or correct to 2.

DONT is a convention developed by Marty Bergen which stands for "Disturbing Opponents' NoTrump". It is designed to allow any one- or two-suited overcall of a 1NT opening. It is one of many conventions for interfering over opponents' 1NT opening. This convention is alertable.

Convention Edit

After right-hand opponent opens 1NT,

      • Double shows a one-suited hand (6+ card suit). This bid is artificial and forcing.
        • Partner should relay 2 with most hands, and overcaller will correct to suit.
        • Other bids are natural, showing a long suit and suggesting a sign off.
      • 2 shows a two-suited hand (at least 5-4) with clubs and a higher suit.
      • 2 shows a two-suited hand with diamonds and a higher suit.
        • After 2/, partner may pass with 3-card support.
        • Without support (or with better support for all higher suits), bid the next higher suit. Overcaller will pass or correct.
      • 2 shows a two-suited hand with hearts and spades.
        • Partner may pass or correct to 2.
      • 2 shows a one-suited hand with spades.

Since there are two ways to show spades, a direct bid of 2 is weaker than doubling first. The point requirements are not fixed, but generally shorter suits require more points.

Note that jump overcalls are typically not weak in this case, although some argue that they should be.

Other responses Edit

      • A raise of overcaller's suit is mildly invitational (requiring 4-card support, at least), but usually passed.
      • With a strong hand, overcaller's partner can bid a forcing 2NT to ask partner to better describe his shape and range.
        • There are a number of possible rebidding schemes. One treatment is 3 shows a minimum and everything else is natural and stronger.

If opener's partner continues to bid Edit

      • All the above responses are still in effect.
      • Double is for takeout, showing support for all possible suits and asking partner to pick one.

Discussion Edit

  • 2 shows a one-suited hand with spades.

Since there are two ways to show spades, a direct bid of 2 is weaker than doubling first. The point requirements are not fixed, but generally shorter suits require more points.

Note that jump overcalls are typically not weak in this case, although some argue that they should be.

Other responses Edit

  • A raise of overcaller's suit is mildly invitational (requiring 4-card support, at least), but usually passed.
  • With a strong hand, overcaller's partner can bid a forcing 2NT to ask partner to better describe his shape and range.
    • There are a number of possible rebidding schemes. One treatment is 3 shows a minimum and everything else is natural and stronger.

If opener's partner continues to bid Edit

  • All the above responses are still in effect.
  • Double is for takeout, showing support for all possible suits and asking partner to pick one.

Discussion Edit

DONT and Cappelletti are the two most common defenses to 1NT. They each have advantages and disadvantages. DONT gives preference to minors and gives up the strength-showing double, but gains more flexibility in the hands that can interfere. A common compromise is to use DONT against strong 1NT openings and Capp. against weak 1NT openings.

DONT runout Edit

The same convention above can also be used as a runout system when 1NT is doubled.

External Links Edit

lexibility in the hands that can interfere. A common compromise is to use DONT against strong 1NT openings and Capp. against weak 1NT openings.

DONT runout Edit

The same convention above can also be used as a runout system when 1NT is doubled.

External Links Edit

  • Double shows a one-suited hand (6+ card suit). This bid is artificial and forcing.
    • Partner should relay 2 with most hands, and overcaller will correct to suit.
    • Other bids are natural, showing a long suit and suggesting a sign off.
  • 2 shows a two-suited hand (at least 5-4) with clubs and a higher suit.
  • 2 shows a two-suited hand with diamonds and a higher suit.
    • After 2/, partner may pass with 3-card support.
    • Without support (or with better support for all higher suits), bid the next higher suit. Overcaller will pass or correct.
  • 2 shows a two-suited hand with hearts and spades.
    • Partner may pass or correct to 2.
  • 2 shows a one-suited hand with spades.

Since there are two ways to show spades, a direct bid of 2 is weaker than doubling first. The point requirements are not fixed, but generally shorter suits require more points.

Note that jump overcalls are typically not weak in this case, although some argue that they should be.

Other responses Edit

  • A raise of overcaller's suit is mildly invitational (requiring 4-card support, at least), but usually passed.
  • With a strong hand, overcaller's partner can bid a forcing 2NT to ask partner to better describe his shape and range.
    • There are a number of possible rebidding schemes. One treatment is 3 shows a minimum and everything else is natural and stronger.

If opener's partner continues to bid Edit

  • All the above responses are still in effect.
  • Double is for takeout, showing support for all possible suits and asking partner to pick one.

Discussion Edit

DONT and Cappelletti are the two most common defenses to 1NT. They each have advantages and disadvantages. DONT gives preference to minors and gives up the strength-showing double, but gains more flexibility in the hands that can interfere. A common compromise is to use DONT against strong 1NT openings and Capp. against weak 1NT openings.

DONT runout Edit

The same convention above can also be used as a runout system when 1NT is doubled.

External Links Edit

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