Mau - Major Opening
The requirement for an opening bid of one in a major is 12 - 19 points and a 5 card suit.
The point requirement may be a bit shaded in the 3rd or 4th position.
A response of 1 NT is forcing for one round. The opener may be forced to rebid a 3 card minor.
A response of 1 NT by a passed hand is semi-forcing.
All raises are weak. A response of a minor at the 2-level is forcing to game (2 over 1).
Mau uses Jacoby 2NT and is prepared in case oponents intervene
over it.
Mau uses the complete set of Bergen Raises.
Over a major opening Mau uses the splinters described in Bergen Raises.
To conserve space, Mau reverses the meanings of 3C and 3D
i.e. 3C is a limit raise with 4 trumps and 3D shows 7-9 points with 4 trumps.
After a response of 3C, a 3D rebid asks for shortage.
Over a 3rd or 4th hand opening (i.e. responder is a passed hand),
Mau uses Reverse 2-way fit showing Drury;
Bergen raises of 3C and 3D are still valid.
A drury response of 2D shows a limit raise with 4 trumps and a shortage;
(2NT asks which)
without a shortage the 3C Bergen raise is used.
A 2NT response shows a weak hand with a long minor
a 3C relay is used to ask responder to pass or correct.
Other rebids are forcing.
Game try after a single raise e.g. 1H - 2H
2S, 3C, 3D - Help suit game try
3H - Need help in trump
2N - asking for doubleton
resp 3H - 4-3-3-3 minimum
resp 3N - 4-3-3-3 maximum
resp 3 suit - doubleton
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