1 Club Opening bid & Responses

   

These sequences following a 1 at the 1-level are very different to sequences over all other 1-level openings.

Requirements:
         4+ card Club suit 12-18 HCP.  7 1/2 LTC maximum. In short - a sound opening. Denies a 5 card Major.
         Distributional 5431 hands with 5+ Clubs and a 4 card Major 11+ HCP .Allows a for a rebid of 2nd suit.
In short either the longest suit or a 4 card suit and 12+ HCP!

Structural conditions:
     1NT must be prefered with 45 Clubs and 12-14  & Diamonds are shorter than clubs also Qxx or better if 3 card.
Important 'D&H transfer' sequences & continuations:


Note: Completing the 'transfer' shows a 12-(15)HCP 4 card fit in Hearts or Spades!

1 12+HCP & 4+ Clubs   Note: 1 is strictly 12+ , responder must reply at the 1-level.

1 4+ Hearts 4+ HCP – 4 Spades is not excluded

1 4+ Hearts 12-14-(15) HCP - FIT.

1 Responder shows 4-4 or better in Majors

1|2|3N or 234 To play

                                or trial bids

2 4+ Hearts (15)-16+ HCP - Forcing fit

1   4 Spades 0-3 Hearts 12+ HCP

2 To Play 6+ cards

                        2 10+ 'Inverted' 5+ Clubs, 10+ HCP

                        3 Weak, 5+ Clubs , some distribution, <=9HCP

                        1N <=9 HCP

                        234S Natural, limit bids, over any intervention 2N is Trustcott.

1N 12-16 HCP Balanced: i.e. 3-3-3-4 or {3-3-2}-5 or {43}24 or {42}34 or {41}44

2 To Play 6+ cards <9HCP

                        2 Cowhurst Inquiry - 9+ HCP Responses: show 3 card Major up-the-line or 2D min etc.

PASS

2N Invitational

2 5+ Clubs Natural

2 To Play 6+ cards

                         Raises natural limit bids.

2 4+ Diamonds 5+ Clubs, Natural

2 To Play 6+ cards

2 4+ Spades 4+ Clubs (15)16+  4-5 LTC

2N 17-18 HCP Balanced - Natural continuations: 3N to play, 3 rebid 6+ card suit weak, other 3-level bids Forcing

1 4+ Spades 4+ HCP – 0-3 Hearts

1 shows 4+ card Spades 12-14-(15) HCP 0-3 Hearts

2 4+ Spades (15)-16+ HCP

1N 12-16 HCP 3-3-3-4 or 3-3-2-5

2N Invitational

2 5+ Clubs Natural

2 4 Diamonds  Natural

2 4+ Hearts 5+ Clubs (15)+ HCP

` 2N 17-18 HCP Balanced

3 6+ Cards, 15+ HCP

        1! (9)10+ denies any 4 card major

                2  Natural 5+ Cards

                2 4  Diamonds & 5+ Clubs unbalanced - (NOT 2245 this should be opened 1NT if point count suitable)

                1N  12-16 Balanced, Crowhurst 

                       2 inquiry  9+

                2N Balanced Natural. 17-18 CP

1N 0-8(9) denies any 4 card major

PASS nothing to say

                2 To play

2 16+HCP

PASS

2N Both major guards

3 5+ Clubs - a Weak Inverted minor 8+DP

         2 4+ Clubs (9)10+ HCP - Inverted minor continuations - denies any Major suit

         2 5+ Diamonds.  Denies any other suit.   (9)10+ HCP

2|S (15)16+ & quality 5 or 6+ Card Major

2N Balanced 'Baron' – suits bid 'up-the-line' (15)16+ HCP - can show a good 3 card major guard en-route

         3 Inverted pre-emptive  club raise  <=9 HCP. Requires distributional features and 5+ card Clubs.

Jump rebids by opener:
     
A NEW suit bid shows a side suit that may be 2-3 cards with at least (1)2  top controls in it - forcing. Also implies a single suited hand in clubs - 5+ cards.
A 2NT jump rebid shows 17-18 HCP balanced hand
A jump rebid in clubs shws 6+ card suit and 16+ HCP

Intervention 1-12X simple overcall or weak jump overcall

X=

1D: This is easily circumvented:

*: If A T_O: Has no effect! But provides an additional bids of Redouble and PASS:

1Ma: Mild intervention: Limited effect

2NT: Trustcott over any 1 Level suit intervention 1  shows a good raise to at least 3

1N: Strength showing intervention

Breakouts

A jump to the 3-level is a Breakout over the 1 opening 7+ card suit. Breakouts are NOT available over 1 openings!
These reponses also explicitly deny holding any 4 card major side suit.

3
all show 7 card suits (possibly a very good 6 card suit) when bid with a jump.
Warning: These bids cannot be made if opponents intervene with a weak 2 overcall - as  Rubinsohl transfers are now now made available - weak or strong
- see below.
3 requires any 6 card or a  good 5 card auit, and some distribution. This is to be treated as a weak inverted minor bid even if bid over a weak 2 intervention.

2 Level weak interventions

2-level suit overcalls, 5+ cards

        * Shows 10+HCP -  The suit below!

         2N-3: Rubinsohl transfers , shows a Good 6+ Card Suit

         3S transfer to 3N to play - guard promised
       PASS Natural.