This text is written for a 12-14NT. This
system may be played with other 3 point ranges of balanced hands or even a
variable NT - adjust as required. Nevertheless we strongly recommend the weak 12-14 NT as it importantly limits our 1♣ opening. See differentiation of 1Club or 1NT opening note.

There are a number of strict shape & HCP constraints:

- No singleton or void is allowed.
- Minor suit distribution MUST be either: 4-4, {4-3} or
4-5, 3-5, 2-6 that's always 7 or 8 minor cards! Minimum minor suit of 3 cards must be Hxx where H=A|K|Q

- Possible major suit distributions are: 3-3, 4-2, 3-2 & 2-2. - Therefore: Never a 5 card Major. Also never both Majors 4-4 - this is always opened 1♥.

- 4243 with a valid 4-3 or 4-4 in the minors and 12-14 is to be opened 1N weak. Otherwise must be opened with 1♣.
- We deduct a point from the '4321' point count
for either a flat 33{34} hand or an Aceless hand or possession of 3
Jacks! At the extreme a deduction of at maost 2 points can occur and a
15|16 (on a 4321 std count) becomes 13|14! At the other end of the
scale we add a point when holding 2 or more aces or a quality 5 card club suit!

- 11 HCP otherwise valid 1NT hands may be opened 1NT in 3rd hand.
- If 4333 with 3-3 in minors open 1♣ - never 1NT. With 3334: 4 in Clubs, PASS with a 12HCP & rebid 2N on a 2♣ inquiry.
- However when the 1NT specification is fully met then 1NT MUST be opened
- The [max/min] for ♠♥♦♣ are: [4/2],[4/2],[4/3],[6/3]. So: Majors minimum is 2-2 and miners {4-3}
- Ideally some HCP should be found in at least 1 Major.
- With a flat 12 HCP seriously consider PASSing when Vulnerable!

Responses:

BID |
HCP |
Nature |
Responses |
Constraint |

2♣! | 0+ |
non-promissory inquiry |
2♥|♠|♦|N|3♣ In Priority Order |
4|4|4|4|5+ , |

2♦!|♥! | 0+ |
Forcing, 5+ major transfers |
2♥|♠ | automatic |

2♠ | (12)13+ |
Forcing, Suggests values for 2|3NT |
2NT: To play 3mi: 3Ma: 3NT: To play |
4-3 in minors 4♦'s or 5♣'s Guard in Major 14HCP |

3♠ | Game values or more |
Transfer to 3NT with both Majors guarded length C>D | 3NT | Rubinsohl Transfer |

3NT |
13-15 |
To play. With both Majors guarded. Length D >= C |
Pass |
Flat hand |

2N|3♣|♦|♥|♠ |
Forcing. Weak breakouts or Strong |
Rubinsohl Transfers - Transfers to 3♣....N. |
Complete transfer OR cue-bid only if OK for 4-level. |
6+ card suit. Any responder rebid in a new suit is game forcing |

4♣|♦ | game values |
Forcing, major transfers, 6+ |
4♥|♠ | |

4♥|♠ | distributional |
Forcing minor transfers: 5+ |
5♣|♦ | |

PASS | 6..9 HCP | ¬ 5 card ♥|♠ |

RHO intervenes with Double.:

PASS: Equal minor length Partner chooses better minor

2♣! Diamonds longer Partner bids 2D but may pass with 5|6 Clubs

**! Longer Clubs Partner bids Clubs.

2♦! and higher bids as above BUT minimum raised: 8+ HCP. Trnsfers to majors now 6 cards if weak May be 5+ cards if 12+ HCP

Note: No equivalent for 2♣ response available or desirable!

Continuations with no interventions:

Usual rebids with 2♣! NP staymanic inquiry: 1NT-2♣! are: P(4cards) 2♥|♠|♦|3♣(5|6 cards) However 2♦ does not simply deny a 4 card Major: it also shows precisely 4 cards in Diamonds & 3|4 cards in Clubs! Also no immediate Jump responses are permitted - one must first await news of a fit. When a 4 card Major is disclosed: openers distribution is known to be precisely 42|24 in the majors and {4-3} in the minors. The choice between responding 2♦ showing 4 cards or 3♣ showing 5 cards is to prefer a 2♦ bid (if partner calls 2N then rebid 3♣ )

If ♦'s are just 3 cards the worst case for Clubs is 4 cards and the overall distribution is 3334. In this particular case PASS is best selected when responder is <10 HCP.

A direct raise 1N-3N is to play it of course claims some controls and length in both Majors! [Caution:- a raise to 2N is a Rubinsohl transfer: showing a 6+ card Club suit!]

1N-2♠ shows values for at least 2N and usually a flattish hand

A 3♣ response to a 2♣ inquiry shows 5|6 cards in Clubs, but denies additional strength - not looking for NT contract at all - just aiming at the best known fit!.

Usual rebids with 2♠! forcing inquiry aimed at a minor suit contract or possibly 2|3N, and promises (12)13+HCP. With 12-(13) rebid better minor - clubs if equal; if 14 HCP. If (13)-14 bid the Major with a guard else 2|3N.

A Rubinsohl transfer response shows a good suit. Opener can simply complete (not interested in game)

the transfer or cue-bid (tacitly agreeing partners indicated suit) responder has shown 16+DP and a good suit 6+ cards. Either partner can terminate the bidding by returning to responder's suit.

Rare 4-level bids allow direct raise to Game in the Major to be shown OR invitational minor game suggestions too.

1NT-3♠ Transfer to 3N. This gives us 2 sequences to 3N i.e.. 1N-3N. The suggested difference is prefer 3S with Club length longer than Diamonds length 3-4, 3-5,4-5,3-6 . Else bid 3N Direct with precisely when Diamond length >= Club length i.e.: 4D & 3C or 4-4.

All Rubinsohl transfers must be accepted by bidding denomination +1. A stronger responder may make any other bid - game forcing-.

1NT-2♦-2♥: or 1NT-2♥-2♠: Either weak 5 card suit or a 6 card with probable 8 tricks. Responder may raise to 3 of his major - invitational with the latter. Use NP 2♣ with a weak 6 card major. If responder offers game by raising bid 4 with a max or excellent cards (A's & K's rather than Q's & J's

If responder now bid another suit this is asking for help.

1N-4♥|♠ transfers to 5♣|♦