We use only three of the asking bids; Alpha, Gamma and a control ask.
Whenever the 1c opener bids a suit of his own after a positive response, he asks about partner's holding in this suit; at the same time partner gives information about his controls.
Suppose the bidding begins 1c - 1h - 1s; 1s is Alpha and asks for responses as follows:
| 1st step (1N) | no positive support for spades (less than Hxx or xxxx) and not more than 3 controls |
| 2nd step (2c) | no positive support for spades, but upwards of 4 controls |
| 3rd step (2d) | positive support (Qxx, xxxx, or better), but not more than 3 controls |
| 4th step (2h) | positive support, upwards of 4 controls |
| 5th step (2s) | 4-card positive support (Qxxx or better) upwards of 4 controls |
The 6th and higher steps are defined in one of two ways:
In general after receiving a response showing positive support, opener will either bid a new suit (presumably a natural slam try), or bids responder's suit to show a fit. In the case of bidding responder's suit, the bid acts as a Gamma bid (see Gamma asking bid ) if and only if the bid is 2h, 2s, 3c or 3d.
However after receiving a response showing positive support for a minor when responder has shown a 7-12 HCP balanced hand, we change our approach. In order to "switch suits" into a possible major suit fit, bids of 3 major are an attempt to find a 4-4 fit in that major. In order to initiate N or slam tries with the minor suit agreed, it is necessary for opener to bid 3 minor. If he bids 3 of the agreed minor, he doesn't show or deny anything in particular about his suit, but there are negative inferences to be drawn about his holding in the other minor.
Examples:
| s AKxx | s xx |
| h AQ | h Kxxx |
| d Qx | d AJxx |
| c QJ10xx | c Axx |
| 1c | 1s |
| 2c | 2N (fit with 4+ controls) |
| 3s | 3N (no s fit) |
| ? | |
|
| |
| sAKx | sxx |
| sAQx | hKxxx |
| dQx | dAJxx |
| cQJ10xx | cAxx |
| 1c | 1s |
| 2c | 2N (fit with 4+ controls) |
| 3c (probably no control) d | 3d |
| 3N | 4h |
| 4s | ? |
This asking bid occurs when opener supports his partner's suit. This initiates inquiry about the suit, to which responder answers as follows:
In forcing auctions that begin with opener bidding 1N as his first natural bid after a positive natural bid by responder, the 1N bid asks for controls:
| Responder's Bid | Controls shown |
|---|---|
| 2c | 0 - 2 |
| 2d | 3 |
| 2h | 4 |
| 2s | 5 |
| 2N | 6 or more |
|
| |
| Higher responses by responder are natural and show 5-5 or better. It is not clear how many controls he has. | |
The auctions where 1N is a control ask are:
| Opener | Enemy | Responder | |
|---|---|---|---|
|
| |||
| 1c | (1d) | 1h/s | |
| 1N | |||
|
| |||
| 1c | (1h) | 1s | |
| 1N | |||
|
| |||
| 1c | (pass) | 1h | |
| 1N | |||
|
| |||
| 1c | (Double) | 1d/h/s | |
| 1N | |||