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Major-suit Inversion: Is There a Gain?
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Forget for the moment, that my 1 opening denies a four-card major and asks for a five-card major. (with a four-card major will open 1 )

For most, a 1 or 1  response over 1 shows four (or more).

INVERTED

- 1  (=Spades)

STANDARD

- 1

                    Opener's Rebids

INVERTED                               STANDARD

- 1 = three-card support.     

- 2 = four-card support.         2 = three or four-card support (for some/most)

- 1NT= denying support.          1NT= may have three-card support.     

GAIN FOR INVERSION?

Yes, able to distinguish between three and four-card support.

 

INVERTED

- 1  (=Hearts)

STANDARD

- 1

GAIN FOR INVERSION?

Yes, steals a 1 overcall from 4th chair.

                   Opener's Rebids

INVERTED                              STANDARD

                                                1 =no heart support

- 1NT= no heart support.        1NT= no heart support.

- 2 Hearts= heart support.     2 Hearts= heart support.

GAIN FOR INVERSION?

No, potential loss of spade fit when responder has both majors.

 CONCLUSION

Not a whole lot of gain playing "standard" openings.

The gain would/might come from playing specialized 1 and 1 openings

OK, thought some of you might find some of the relevant CC section interesting,

other no doubt, will find it amusing:)

 

GENERAL APPROCH INVERTED MAJORS (anti 2/1)

MINOR OPENING EML: NF 0 (denies a 4-card major)

                                        NF 0 (shows a 4-card major)

1 - 1 =relay asking for shape

1 - 1 =five spades

1 - 1 =five hearts

1 - 1 =spades

1 - 1 =hearts

Single raise shows 4 spades + 5 hearts to play or invitational values

Double raise shows 4 spades + 5 hearts game-forcing values

1 - 2 =5 spades + 4 hearts to play or invitational values

1 - 3 =5 spades + 4 hearts game-forcing values

1 - 1NT=8-11   2NT=12 HCP    3NT=13-16

 

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