2C

Opener has one of 2 classes of opening hands containing a 5+card Club suit:

Responses

2D
Forcing

An artificial inquiry, showing 8-11HCP.

Opener's rebids are as follows:

New Suit
Show a strong 2-suited hand; with a strong 6-5 opener may jump.
2NT
12-16HCP, single suited hand, two guards outside of Clubs.

Responders options are now:

3D
Relay; opener identifies his stoppers by bidding as follows:
3H
Stoppers in Hearts and Diamonds;
3S
Stoppers in Spades and Diamonds;
3NT
Stoppers in Hearts and Spades.
3H
Game forcing

12+HCP, 5+card suit, reversing values in support of Clubs.

Opener rebids as follows:

3S
Guards in Spades and Hearts;
3NT
Guards in Spades and Diamonds;
4C
Guards in Hearts & Diamonds, but not A or K of Hearts.
4D
Fit for Hearts (Kxx or better) and A or K of Diamonds.
4H
Fit for Hearts (Kxx or better) and guard, but not A or K, in Diamonds.

These responses encapsulate these principles:

  • A direct raise shows support in an unexceptional hand;
  • 3NT means all suits are covered;
  • 4C shows moderate support but no more than a guard in the other suits;
  • A cue bid shows a good fit and a control.
3S
Game forcing

12+HCP, 5+card suit, reversing values in support of Clubs.

Opener rebids as follows:

3NT
Guards in Spades and Diamonds;
4C
Guards in Spades and a Red suit, but not A or K of Spades.
4D
Fit for Spades (Kxx or better) and A or K of Diamonds.
4H
Fit for Spades (Kxx or better) and A or K of Hearts.
4S
Fit for Spades (Kxx or better), but no control in a Red suit.

These responses encapsulate these principles:

  • A direct raise shows support in an unexceptional hand;
  • 3NT means all suits are covered;
  • 4C shows moderate support but no more than a guard in the other suits;
  • A cue bid shows a good fit and a control.
3C
12-16HCP, single suited hand, one guard outside of Clubs.

Responders options are now:

3D
Relay; opener identifies his stopper by rebidding 3NT with a stopper in Diamonds, or the major he has stopped.

3H,3S
Game forcing

12+HCP, 5+card suit, reversing values in support of Clubs.

Opener can:

  • Raise to game with support; or
  • (over 3H) Bid 3S with a guard in Spades; or
  • Bid 4C.

2H
6-11HCP, good 5+ card Heart suit.

Opener can raise with a good hand and support, or with no support may correct to 3C.

With an average 2-suiter opener rebids his suit at the minimum level; with a strong 6-5 he may jump into his second suit.

If Hearts were his second suit, opener can cue bid 4D to show a strong hand with a good fit and control of Diamonds; because the opening guarantees control of Clubs, a bid of 4C is used as a cue bid that denies control of Diamonds.

2S
6-11HCP, good 5+ card Spade suit.

Opener can raise with a good hand and support, or with no support may correct to 3C.

With an average 2-suiter opener rebids his suit at the minimum level; with a strong 6-5 he may jump into his second suit.

If Spades were his second suit, opener can cue bid 4D to show a strong hand with a good fit and control of Diamonds; because the opening guarantees control of Clubs, a bid of 4C is used as a cue bid that denies control of Diamonds.

2NT
10-11HCP, relatively balanced.

With a lower-range hand opener may pass with average clubs or correct to 3C with good clubs.

A new suit from opener is forcing, showing a strong 2-suited hand; with a strong 6-5 opener may jump in his second suit.

Raise
Any direct raise of a 2C opening are limit raises, using the Losing Trick Count.
3D,3H,3S
Game forcing

12+HCP, a powerful 6+card suit.

Opener can show a limited hand by bidding 3NT or by raising to game; a new suit or a temporizing bid of 4C show a stronger hand.

3NT
12-13HCP, relatively balanced.