OliverC's Precision Parlour        Guest User

When is a Bid Zeta?

Zeta occurs in one situation only, which is a jump-shift by Opener immediately over a positive response to 1♣. There is no such thing as a repeat Zeta, but high-level Beta is always available if Responder shows a range of controls in response to Zeta.

Scales for Zeta

There are only two scales available for Zeta, depending on whether or not Responder is a passed hand:

Normal Scale

The normal scale for Zeta is used when Responder's strength is unknown:

1. : 0-2 Controls
2. : 3 Controls
3. : 4 Controls
4. : 5 Controls
5. ...etc etc (open ended)

Weak Scale

The weak scale for Zeta is used when Responder is a passed hand:

1. : No Controls
2. : 1 Control
3. : 2 Controls
4. : 3 Controls
5. : 4 Controls

Notes

• If Opener does have a fit for Responder's suit, it is often cheaper and easier to use a low-level Beta followed by a Gamma in Responder's suit, even if Opener would rather play in their own suit. They can always jump-shift into their own suit later on, and do have the benefit of being able to make an Epsilon Ask in their own suit, something not possible if they use Zeta. In any case, in such a situation the solidity of the combined fit in Responder's suit will often limit how high the hand can be played in any case. Zeta is most useful when Opener has a singleton or void in Responder's suit, or perhaps a holding such as Ax. If Opener has a holding in responder's suit as good as Hxx it's almost never worth using Zeta.