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2C Opening - GF or weak both majors? System Structure

#21 User is offline   dorisga44 

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Posted 2018-March-02, 07:54

View PostKungsgeten, on 2018-March-01, 10:13, said:

So you want Ekren, as well as two tiers of weak opening bids in the majors? In that case I think putting the Ekren hand type in 2C might be the best solution, and I think nullve's response scheme looks nice. Another possible solution could be something like below (in this case I assume the "good weak two" is 10-13 hcp):

2C = Weak with diamonds, or 10-13 with hearts, or 22+ NT, or GF with primary major.
2D = Weak with hearts, or 10-13 with spades, or GF with primary minor.
2H = Ekren.
2S = Weak.
2NT = Strong.

Over 2C you could play:

2D = Non-forcing relay.
...Pass = Weak with diamonds.
...2H = 10-13 with hearts.
...2S = Natural GF.
...2NT = 22-24 NT
...3C/D/H/S = GF with hearts.
...3NT = 25-27 NT...
2H = Forcing relay. INV+ vs weak hand with diamonds.
...2S = Strong with a major.
...2NT = Strong.
...3C = Diamonds max.
...3D = Diamonds min.
...3H = 10-13 hearts min.
...3S = 10-13 hearts max.


Very nice Kung. Will make a few adjustments but this looks very playable. Thanks
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#22 User is offline   nullve 

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Posted 2018-March-03, 09:08

View Postdorisga44, on 2018-March-02, 07:54, said:

Very nice Kung. Will make a few adjustments but this looks very playable. Thanks

The 2 and 2 openings are brown stickers according to the WBF Systems Policy, so will you be able to play them?

Another possibility (without brown stickers):

2 = bad Weak Two in a major OR strong (GF if unBAL) without 5+M4+OM
2 = Ekren, either weak or GF
2M = constructive Weak Two

2-?:

2 = relay, can stand the 3-level opposite a bad Weak Two*
...2 = Kokish OR bad Weak 2 (NB!)
......2 = relay, not exactly INV opposite bad Weak 2
.........2N = BAL
.........3 = strong, 5+H4+C
.........3 = strong, 5+H4+D
.........3 = strong, 6+ H
.........3 = bad Weak 2 (NB!)
.........(...)
......2N = INV+ opposite bad Weak 2, relay
......(...)
...2 = strong, 5+ S, unBAL OR bad Weak 2
......2N = relay, not exactly INV opposite bad Weak 2
.........3 = strong, 5+S4+C
.........3 = bad Weak 2 (NB!)
.........3 = strong, 5+S4+D (NB!)
.........3 = strong, 6+ S
.........(...)
......3 = INV+ opposite bad Weak 2
......(...)
...2N+: same as 2N over 2-2 in standard
2 = P/C
...P = bad Weak 2
...2 = bad Weak 2
...2N+: not sure*, but maybe
...2N = strong, 5+ H, unBAL OR BAL
......3 = Puppet Stayman-like
.........3 = BAL, not 5 S
.........3 = 6+ H (unBAL)
.........3 = BAL, 5 S
.........3N+ = 5 H, unBAL
......3 = 5+ S
.....(...)
...3 = strong, 5+ C, unBAL
...3 = strong, 5+ S, unBAL
...3+ = strong, 5+ D, unBAL
...?
2 = P/C
...P = bad Weak 2
...2N+: not sure*, but maybe
...2N = strong, 5+ S, unBAL OR BAL
......3 = Puppet Stayman-like
.........3 = BAL, not 5 H
.........3 = BAL, 5 H
.........3 = 6+ S (unBAL)
.........3N+ = 5 S, unBAL
......3 = 5+ H
.....(...)
...3 = strong, 5+ C, unBAL
...3 = strong, 5+ H, unBAL OR bad Weak 2
...3+ = strong, 5+ D, unBAL
...?
(...)

* It helps a lot if 2N over 2-2M is GF, but then the 2M response has to promise some values. So maybe the 2 response should also include very weak hands regardless of 3-level safety?

This post has been edited by nullve: 2018-March-04, 06:47

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