[plypoin]

We play
1♦ = 12-15 with 2+♦, not 15 ball, since we use 15-17 1NT
2♣ = 12-15 6+ ♣ or (5+♣ with 4M)
2♦ = 4404 or 4414 12-15

after 1♦, we use 2m as limit+ with 4+#m. The idea is we could use 1NT as "trash" 6-9 HCP, put balanced invitational in 2m, also put 5m4M game forcing hand in 2m
so
after 1♦ -
1M (6+, 4+M)
1NT 6-9 "trash" - balanced or long minor.
2m 10+ 4+#m, possible 5m 4M with GF hand

after 1♦ - 2m, opener rebid are mostly artificial
2♦ 6(5)+ ♦ unbalanced minimum hand
2♥ balanced minimum (12-13)
2♠ unbalanced maximum with 4# in responder minor (14-15)
2NT balanced max (13-14)
3♣ unbalanced minimum with 4# in responder minor

responder : any reverse in major is 5m4M hand, and rebid to minor after minimum hand is to play

so far, we havent met any problem when playing this system, any thought ?

[Zelandakh]

First of all, a standard trick in Modern Precision is to include (4-3)=1=5 hands into the 2♦ opening in order to allow the 2♣ opening to promise 6+ clubs. I would recommend this for the way your system is structured.

Secondly for Opener's rebid there does not appear to be an option for an unbalanced maximum without 4 cards in Responder's minor. That would represent a problem for me in playing the system but perhaps it has just not come up yet in real play.

[straube]

http://web.cs.ucla.e...IMprecision.pdf

I'd look over page 21 for some ideas.

[rbforster]

 straube, on 2019-August-20, 11:40, said:

http://web.cs.ucla.e...IMprecision.pdf

I'd look over page 21 for some ideas.

Although be aware that system uses 1D as balanced or diamonds, but excludes long diamonds single suited (which opens 2D). Some of the unbalanced continuations by 1D opener assume it’s a 3-suited hand or both minors.

As an alternative, here’s the outline for a 1D (2+ nat or balanced, 9-15hcp) response for 1D-2C. This 1D is a bit lighter/wider than yours, so adjust your strength ranges according. For 1D-2D, I play that as inverted with 4+ D and no 4M, F1.

1D-2C showing 4+ clubs 10+ pts F1

2D​ any minimum, 9-12ish, but without good club support (non-forcing and passable)
2H​ extras with a 4cM 13-15, could be balanced or unbalanced
2S​ extras 12-15, unbalanced with 1 or both minors
2N​ 13 balanced no 4cM
3C​ 4+ clubs min (9-11)
3D ​6+ diamonds invitational (12-13)
3N​ 14-15 balanced no 4cM

[plypoin]

 Zelandakh, on 2019-August-20, 09:10, said:

First of all, a standard trick in Modern Precision is to include (4-3)=1=5 hands into the 2♦ opening in order to allow the 2♣ opening to promise 6+ clubs. I would recommend this for the way your system is structured.

Secondly for Opener's rebid there does not appear to be an option for an unbalanced maximum without 4 cards in Responder's minor. That would represent a problem for me in playing the system but perhaps it has just not come up yet in real play.

for the first, can you give me the continuation for (43)15 2♦?

second
i dont see a problem for unbalanced maximum w/o responder minor, for instances:
1♦-2♣
3♦ would show that
or
1♦-2♦
it would be near impossible to opener have unbalanced club hand with 1♦ opening, since we use 2♣ and 2♦ that way

[Zelandakh]

 plypoin, on 2019-August-21, 02:21, said:

for the first, can you give me the continuation for (43)15 2♦?

second
i dont see a problem for unbalanced maximum w/o responder minor, for instances:
1♦-2♣
3♦ would show that
or
1♦-2♦
it would be near impossible to opener have unbalanced club hand with 1♦ opening, since we use 2♣ and 2♦ that way

A common version of the Precision 2♦ opening

If 3♦ shows that then it is new as that was missed from the OP. 2♦ is listed as showing a minimum though so that is surely out (unless the OP is wrong).

I assume after 1♦ - 2m; 3♦ you play 3M as stopper-asking? That would seem to take care of most common cases, more or less. There are still some issues if Responder has a slam hand and decisions between 3NT and 5m are probably going to be less well informed than other methods but these cases are comparatively rare.

I would rate the system as playable but not optimal. Are there any specific areas of thought you would like to hear about?

[straube]

2N-asks
.....3C-min
..........3D-asks
...............3H-3415
...............3S-4315
...............3N-4414
...............4C-4405
.....3D-max, 3415
.....3H-max, 4315
.....3S-max, 4414
.....3N-max, 4405

[ldrews]

I have found that I avoid all of these problems, and several others, by using a wider range 1NT opening, 11-15. Then 1D becomes natural. The wider range NT is managed on the rebids. Another benefit is that the 1NT opening occurs approx 30% of the time causing bidding difficulties for the opponents.

[1Wishbone1]

 plypoin, on 2019-August-20, 08:51, said:

We play
1♦ = 12-15 with 2+♦, not 15 ball, since we use 15-17 1NT
...

Plz excuse the interruption.

I like your ideas and especially the 15 - 17 (or 18) NT for Balanced hands. It implies that a 1 ♣ with 16 - 17 HCPs probably has a Singleton and if the Club Opener is greater than 17 HCPS, Defenders beware.
Do you find that this Range has helped your 1 ♣ Opening?

Thnx,

CW