Opening bids |
Responses |
|
1 | 12+ HCP, 3+ or 4 4 3 2 | Responses to 1 (Natural) |
1 | 12+ HCP, 4+ (Including 5 4, 11-15) | Responses to 1 (Inverted Minor) |
1 | 12+ HCP, 5+ | Responses to 1/ |
1 | 12+ HCP, 5+ | Responses to 1/ |
1NT | 15 - 17 balanced | 1NT complex |
2 | GF or 20-22 / 25-26 balanced or SemiGF in / | Ryall Paradox responses |
2 | Multi: Weak two in / or SemiGF in / or 23-24 / 27-28 bal. | |
2 | Muiderberg in | |
2 | Muiderberg in | |
2NT | Unusual: Weak / Strong with + |
The 2 opening bid can also be combined with weak variants. Common treatments are to include a Weak Two in or Ekren. In both cases the responses are copied from the weak opening, ignoring the strong variants in the first round of bidding.
Responses | |
1 | 6+ HCP with 5+, or GF without 4-card / |
1/ | 6+ HCP, 4+card |
1NT | 6 - 10 balanced |
2 | 6 - 9 HCP, 5+ |
2// | 3 - 7 HCP, 6+card (Weak Jump Shift) |
2NT | 11 - 12 balanced |
3 | Invitational, 5+ |
3NT | 13 - 15 balanced |
It is also possible to include Transfer Walsh into the system. This means that the 1-over-1 responses are interchanged, putting more emphasis on the majors: 1 shows , 1 shows , and 1 shows .
Responses | |
1/ | 6+ HCP, 4+card |
1NT | 7 - 10 balanced |
2 | 11+, 4+ (balanced or GF) |
2 | GF, 4+ (Inverted Minor) |
2/ | 3 - 7 HCP, 6+card (Weak Jump Shift) |
2NT | Invitational, 6+ or 4+ |
3 | Bergen Raise: 7 - 9 FP, 5+ |
3 | 0 - 6 FP, 5+ |
3NT | 13 - 15 balanced |
2, the notorious trouble spot, is GF except if responder passes opener's negative rebid (2 or 2NT).
2NT shows an invite in either minor. It will rarely be passed although it is possible in matchpoints.
3 is a Bergen Raise of .
Responses | |
1 (over 1) | 6+ HCP, 4+ |
1NT | 6 - 9 balanced (may have -support) |
2/ | Invite or better, 4+card |
2 (over 1) | 10+ HCP, 5+ |
2M | 6 - 9 FP, 3-card support |
2 (over 1) | 3 - 7 HCP, 6+ (Weak Jump Shift) |
2NT | Invite with 3-card support or Slam-going with 4-card support (opener now bids a singleton) |
3 | Bergen Raise: 7 - 9 FP, 4-card support |
3 | Bergen Raise: Invite, 4-card support |
3 (over 1) | Invite or better, 3-card , 4+ (fit jump) |
3M | 0 - 6 FP, 4-card support |
3NT | No splinter (12 - 15 balanced with fit) |
2/1 is not game forcing, and specific rules should be set out to know when the GF sets in.