Other doubles

Cooperative DBL

Who: Anyone

When: After a high level pre-empt by opponents

Meaning: Tends to be with a balanced hand and enough values depending on the level. Partner bids according to the LAW.

Level: Unlimited

• 1H-1S-2H-4S-DBL
• 1S-2H-2S-3H-4S-DBL

Parking Lot RDBL

It asks partner to bid the next step. After partner's bid the RDBLer either corrects (or passes) to his suit or bids partner's suit to indicate a fit without an honour card (does not support a lead in the suit). By inference any other suit bid is lead-directing.

Examples:

• 2H-DBL-RDBL
• 3D-DBL-RDBL
• Opening-Overcall-DBL-RDBL
• Opening-Two-suiter (Michaels or 2NT or 2D over a minor)-DBL-RDBL

SOS RDBL of 3NT

This happens in the following situations:

• Preempt - 3NT - DBL - RDBL: shows weaker than expected hand
• Preempt - 3NT - DBL - Pass - Pass - RDBL: shows doubt about the stopper
• Opponents bid a suit and later DBL our 3NT
  • RDBL by player who promised stopper: doubt about the stopper
  • RDBL by the other player: suggests that the alternative contract may be better

Inverted lead-directing DBL

• An opponent responds to Blackwood
• An opponent cuebids "my" suit (Western Q)

It asks partner to lead one of the other side suits. By inference PASS asks for the lead of the bid suit or shows no lead preference at all.

Lead-directing DBL

• Opponents bid 3NT without showing suits. The DBL shows a running suit that partner needs to guess. He defaults to spades if cannot guess.
• 1NT-Pass-3NT-DBL
• 1NT-Pass-2NT-Pass-3NT-DBL
• Opponents bid 3NT and dummy has shown at least 1 suit. The DBL demands the lead in dummy’s first suit.
• 1C-Pass-1S-Pass-1NT-Pass-3NT-DBL: Spades
• 1D-Pass-1H-Pass-1S-Pass-2C-Pass-3NT-Pass-Pass-DBL: Diamond
• You open 1X and opponents bid 3NT. Partner’s DBL demands the lead in dummy’s first suit.
• You open 1X and opponents bid 3NT. Your DBL demands the lead in:
• 1S-1NT-Pass-3NT-DBL: Another suit – a lower ranked suit that you could not bid
• 1C-1S-Pass-2H-Pass-2NT-Pass-3NT-DBL: Your suit – as your opening did not promise a length in it
• You overcall and opponents bid 3NT. Partner’s DBL demands the lead in:
• 1H-1S-2C-Pass-2NT-Pass-3NT-DBL: Clubs (dummy’s suit) as partner did not bid 2S over 2C
• 1D-1H-3D-Pass-3NT-Pass-Pass-DBL: Hearts (your suit) as partner had no opportunity to show heart support at level 2
• You overcall and opponents bid 3NT. Your DBL demands the lead in another suit – usually lower ranked than the suit of your overcall.
• You and your partner each bid a suit and opponents bid 3NT. Your DBL demands the lead in:
• 1C-1D-1H-1S-1NT-Pass-3NT-DBL: Hearts. If you wanted spades (your suit) – you would pass; if you wanted diamonds (partner’s suit) – you would have bid Snapdragon DBL.
• 1D-1H-1S-2C-2NT-Pass-3NT-DBL: Spades - same as above
• 1C-1S-Pass-2H-2NT-Pass-3NT-DBL: Spades. If you wanted hearts, you would have passed.
• Opponents bid a suit slam undisturbed. The DBL (Lightner) demands an unusual lead (not trumps, not the un-bid suit and not a suit bid by the defenders).
• Opponents bid a suit slam undisturbed. You DBL (Latinov) and lead a K or Q of a side suit. This shows a singleton and demands that partner overtakes your lead and gives you a ruff.
• Opponents bid 6NT. The DBL demands ALWAYS the lead in dummy’s first suit.