(Two Diamonds) opening bid shows one of the following hand types:
Responder's available bids are:
2 | Weak hand, does not promise heart support. Opener can rebid 2 should he hold hand type 2). |
| 2 | Inviting game in hearts if that is opener's suit, but signoff if opener's suit is spades. Opener can rebid 3 (signoff), 4 (signoff), or Pass with spades. |
| 2NT | Strong and artificial (see below). |
3 | 7+ clubs, signoff. |
3 | 7+ diamonds, signoff. |
| 3 | Hand inviting game in spades, if that is opener's suit. Opener can rebid 3 (signoff), 4 (signoff), or Pass with hearts. |
| 4 | Strong clubs with support for both majors. |
| 4 | Strong diamonds with support for both majors. |
Opener's responses to the artificial 2NT query are:
| 3 | Weak two-bid in hearts, good hand. |
| 3 | Weak two-bid in spades, good hand. |
| 3 | Weak two-bid in hearts, bad hand. |
| 3 | Weak two-bid in spades, bad hand. |
| 3NT | Strong three-suited hand (17-24 HCP) with a singleton club. |
| 4 | Strong three-suited hand (17-24 HCP) with a singleton diamond. |
| 4 | Strong three-suited hand (17-24 HCP) with a singleton heart. |
| 4 | Strong three-suited hand (17-24 HCP) with a singleton spade. |
If responder makes an original signoff bid, any strange-sounding rebid by opener shows the strong three-suited hand.
opening bid showing 4-4 or longer in hearts and spades.
opening bid showing 4-3 or 4-4 in the majors.
opening bid showing 5-4 in hearts and spades and minimum strength.
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openers that show a 5-card major with a minor side suit.
opening bid from the Precision bidding system, showing a 3-suited hand with minimum strength.
opening bid from the Italian Blue Team bidding system, showing a strong 3-suited hand.
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