symmetric structure over Precision 1D

[shevek]

Please save me some time here.

 

2C = 11-15, 6+ & no major

1D = 11-13 balanced (no 5cM) or what's left

 

That's minors, or 6+ diamonds, or canape with a major, or 3-suited (no 5cM).

 

You can relay with 1H or 1NT. Or ...

 

If you want to exclude 6+ Ds no major by opening 2D with them, that's fine too. You can go further by offloading the 5-4 minor hands to 2C & 2D if you wish.

Feel free to recommend the best opening structure.

[suokko]

Opening both minors in 2 level as limited single-suiter or both minors will put you a lot better placed in competitive situation when you can rebid your minor to show major minor canape after 1♦ opening. Too bad relay structure after 2♦ open is hard to create. In magic diamond 2♥ is relay but there is case to play 2♥ as natural.

 

There should be easily enough space for relays after any other opening so you can even play not so perfect relays and still have enough space for everything.

 

Also system structure depends on if you live in country which has some limitations what you can play. But you could even play 1♦-2m both as possible inv+ start of relay sequence to make it acceptable in acbl.

[akhare]

Please save me some time here.

 

2C = 11-15, 6+ & no major

1D = 11-13 balanced (no 5cM) or what's left

 

That's minors, or 6+ diamonds, or canape with a major, or 3-suited (no 5cM).

 

You can relay with 1H or 1NT. Or ...

 

If you want to exclude 6+ Ds no major by opening 2D with them, that's fine too. You can go further by offloading the 5-4 minor hands to 2C & 2D if you wish.

Feel free to recommend the best opening structure.

I too agree that using 2♣ / 2♦ for 6+ cards is a better approach.

 

This pretty much limits the 1♦ opening to:

 

Balanced hands with 5m332, 4432, 4333 hands outside NT range

Three suited hands with 5m431, 4441m and 5m440m hands (and possibly 5-5 in the minors as well)

 

Given this, a 2♣ GF relay should be able to resolve the shapes pretty easily.

 

Note that this also allows playing a variable NT scheme.

 

Over 2♦, you can probably use 2♠ as the relay...then:

 

2N: 6322, 7222 (no stiff)

3C: High short

3D: Mid short

3H+: Low shortage shapes

 

Granted you will go over 3N with some shapes, but then again, the relay should be used only with at least some slam interest.

[ontherock]

From Volmac Precision

 

2D Opening

Meaning:

6+D, 11-15, KJT+ (or 5D AKQT/AKQJ), may have 5-crd major, may have 16+ if 6+ losers

if minimum 1-suiter, have reason: like 2 of 3 top honors or 7 cards

if 6-4 minors with good 4 and bad 6, consider opening 1D

 

Responses

2H = relay (balanced invit+, or semisolid M slammish, or wk scramble nv)

2S = 5+S forcing

2N = 5+H forcing

3C = transfer to 3D: weak D, or 6+C GF+, or 5M-5other slam, or 5H-4S invit+

BPH: strong limit no major

3D = 5+C, 4M, 1D, no stop oM, GF+

BPH or after strong 1C: pree

3M = 6+M, invit, no C fit

3N = to play

4C = RKC for D

4D = pree

 

 

2D 2H relay (balanced invit+, or semisolid M slammish, or wk scramble nv)

 

2S = max

2N = relay (3C = unbal [3D asks which sing, 3H length ask D], 3D = bal 1-suiter [3M asks stop],

3M = 4-crd, 3N = 4C)

3C/D = 4H/S weak

3M = slammish M

 

2N = minimum no major

3C = GF relay, or strong invite BPH (3D = bal or s.o. opposite PH, 3M = sing, 3N = sing C or

to play opposite PH)

3D = to play

3M = slammish M

 

3C = minimum, 4H (3D/H = to play, 3S = slammish S, 4C/D sets H/D)

3D = minimum, 4S (3H = slammish H, 3S = to play, 4C/D sets S/D)

3H = 5H ( 3S = H?, 4C sets •, 4D/H = to play, 4S slammish S, 4N RKC for H)

3S = 5S (4C/H sets D/S, 4D/S = to play, 4N RKC for S)

3N = 5C (4m = to play, 4H/S sets C/D, 4N RKC for D)

 

2D 2S (5+S forcing)

 

2N = 4H any strength

3C = relay (3D = min, no fit [3H = asks C stop, cue sets D], 3H = max no C stop [3S asks:

3N = half-stop C, 4C = HxS, 4D = no stop no xxS, 4S = xxS], 3S = min fit,

3N = max C stop, 4D = length, cue/4S = Hxx/xxxS max)

3D = to play

3H = 4H limit

3S = 6S GF

4D/cue = sets D/H

 

3C = max, at most xxxS

3D = to play (3S = xxx)

3H = C stop, maybe H stop (3S denies H stop)

3S = 6S GF

3N = H stop, no C stop

4D = sets D

4H = 5H GF

 

3D = min, no S fit or 4H (responses as above to 3C)

 

3H = 5H (3S = 6S or no C stop, 4D/M = to play, 4C sets H or D [4N RKC for D], 4N RKC for H)

 

3S = min 3-crd supp (3N = S?)

 

3N = max, HxxS

 

4C = 5C (4D/S = to play, 4H sets C or D, 4N = to play)

 

4D/H = max 4-crd supp picture/cue

 

4S = min 4-crd supp.

[ontherock]

From SCREAM

 

The 2D opening shows either a one-suited hand with diamonds, or a two-suited hand with at least six diamonds and exactly four clubs.

 

In first and second position: 9-13 HCP 6+D 0-3S 0-3H 0-4C.

In third position: (5)6+D, weak, discipline according to vulnerability.

In fourth position: 2D 13-16 HCP 6D 0-3S 0-3H.

 

Responding to the 2D opening

After 2D

 

A game-forcing relay, natural non-forcing major suit bids, an invitational notrump bid, non-invitational raises, a three-level minor-suit scramble and fit-showing jumps are available.

 

2H Game-forcing relay

2S 2-suited with 6+D and 4C (symmetric continuations) (impossible shapes are omitted from the structure)

2NT+ 1-suited with 6+D (symmetric continuations) 2S Natural, non-forcing (5)6+S

2NT 7+D with broken suit and heart and club honours

3C 3S 3+C 0-1H

3D Solid 7+D

3H 3S 3H 0-1C

3S 3S minimum balanced

3NT Impossible

4D Solid diamonds and 3S

4H 3S maximum balanced

 

2NT Natural, invitational

 

3C Not invitational, wide-ranging, seeking a club contract when responder has four clubs and a diamond contract otherwise

 

3D Not invitational, wide-ranging

 

3H Natural, non-forcing (5)6+H

3NT Impossible

4D Solid diamonds and 3H

4H 3H useful hand

 

3S/4C Fit-showing jump, 6 cards in the suit bid and 3D

 

4NT Both minors, requesting a 5C response when holding four clubs

Games To play

[ontherock]

From Ultra Club

 

2D ! = 10-15 HCP 6+D & 0-2H & 0-2S [WITH 5-5 IN THE MINORS: 2NT (4-10 HCP); WITH 5D & 4C OPEN 1D, (WITH 6D & 4C OPEN 2D)]

2H 6+H Natural & 10-11 HCP & N.F. [bID 2H WITH 8+ HCP & HXX IN D]

Pass H / xx+ & Minimum

2S S: Hx & 0-1H: xx & MAXIMUM: 2263 / 2164 / 2173

2NT 14-15 HCP S & C Stoppers

3C 14-15 HCP & C Stopper , no S Stopper

3D 0-1H & 6D: KQJxxxx+

3H 2H & MAXIMUM: 2263

3S SPLINTER: 1462 / 0463 with very good D: AQJxxx / KQJxxx & MAXIMUM

3NT AKQxxx(x) & 6(7)222+ with K or Q in 2 suits outside C

 

2S 6+S Natural & 10-11 HCP & N.F. [bID 2S WITH 8+ HCP & HXX IN D]

FOLLOW-ONS = SAME AS ABOVE

 

2NT! 10-11 HCP G.I. with D: Hxx: or 12+ hcp & G.F., Opener accepts with 14+ hcp

3C Maximum & C stopper & only 1M stopper

3D Minimum

 

3C To Play: long C and 0-1D

3D PRE-EMPTIVE

3M 6-CARDS M G.F. SAB-2: 1ST STEP = 0-1M, 2ND STEP = 2M & 1-2 CONTROLS, ZOOM >

3NT TO PLAY

4C SPLINTERS, AGREEING D

4D 3+D PRE-EMPTIVE

4H SPLINTER, AGREEING D

4S SPLINTER, AGREEING D

4NT REGULAR BLACKWOOD FOR ACES ONLY: 5C = 0/4, 5D = 1, 5H = 2, 5S = 3

5D To play

[lowerline]

Please save me some time here.

 

2C = 11-15, 6+ & no major

1D = 11-13 balanced (no 5cM) or what's left

 

That's minors, or 6+ diamonds, or canape with a major, or 3-suited (no 5cM).

 

You can relay with 1H or 1NT. Or ...

 

If you want to exclude 6+ Ds no major by opening 2D with them, that's fine too. You can go further by offloading the 5-4 minor hands to 2C & 2D if you wish.

Feel free to recommend the best opening structure.

1♦ = 11-15 4+♦ unbal (longer clubs possible; 1435/4135 possible)

1NT = 12+-15 balanced (incl 5♣422)

2♣ = 11-15 6+♣; not 4♦/5M (4M possible)

2♦/♥ = 11-15 4414/4405/3415/4315

[wclass___]

2♣ 5♣+unbal no 4M 11/15

2♦ 5♦+unbal no 4M 11/15

 

Actually i had the same problem some years ago, but now i am absolutely sure that this is the best usage for these two bids.

[benlessard]

if having a 4M when opening 2C bother you I suggest what lowerline say.

 

The unbalanced 1D showing 4 is clearly a better upside then the downsides of having a possible 4M when opening 2C + the downside of a wider 1Nt range (not close at all imo).

 

Some slight variation

 

 

(41)35 or (14)35 that you can open with 2C or with 1D. I prefer 2C unless the D are great

 

Also you might want to keep a weak 2D and decide to open 1H with 4414 and 2C with (43)15 im in the minority here but i prefer the weak 2D+2H rather than 2d ROMAN because I dont mind too much having a 4M with my 2C opening.

 

Also its very clear to me that diamonds hand in the 16-22 range are better in 1D than in the the strong club. As a nice side benefit 1C--1?---2D show a strong balanced hand.

[shevek]

I'm used to 2C & 2D as 6+ no Major or 5-4 minors, as wclass advocates.

6 & no major is a bit too rare and overloads 1D.

 

That leaves 1D as 11-13 bal or major canapes, or the 3-suiters.

With this reduction, 1NT can be GFR. This means occasional responses in a 3-cd major, which is okay by me. Anyway ...

 

1D  1NT*

 

2C  4 ♠s

2D  11-13 bal, no 5cM

2H  4 ♥s, 5+ ♦s

2S  3-suited without 4♠s (3 hand patterns)

2N+  4 ♥s & 5+ ♣s

 

The 2-suited structure is square symmetric:

 

2♥  2♠*

2N  HS

3♣  2-4-5-2

3♦  3-4-5-1

3♥  2-4-6-1

3♠  3-4-6-0

3N  2-4-7-0

4C  1-4-7-1 (orphan)

 

Likewise with ♥s & ♣s.

Spade hands emerge at the same place.

There are 7 3-suiters with 4 spades. I guess 7-3 is not a good split.

Still, can resolve 7 by 3NT anyway.

 

That leaves 2D for the 22 balanced hands.

Unfortunately, Fibonacci means there is only room for 21 below 3NT.

 

That's acceptable. An alternative is to bid 2C with balanced, throwing the 3-suiters in there as well, though this messes up some of the spade hands.

 

Suggestions welcome.

[shevek]

& this to unravel balanced 11-13

 

1D  1N*

2D  2H*

 

2S  4♠s

2N  4♥s

3C  5♦s

3D  2-3-4-4 / 3-2-4-4

3H  2-3-3-5

3S  3-2-3-5

3N  3-3-2-5

 

2S  2N*

3C  4♠s & 4♥s (one free space)

3D  4♠s & 4♦s

3H  4-2-3-4

3S  4-3-2-4

3N  4-3-3-3

 

This shows 21 of the 22 hands & wastes 1 space.

The 2 that miss are 3-3-4-3 & 3-3-3-4.

 

They can live quite happily with the 3-suiters with spade shortage (3 hands)