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Criss Cross Raise - Also known as the Criss Cross Jump Shift or Crossover, a convention to address minor suit openings when responder has a invitation values (some play game forcing) and no 4 card major.

 

Method 1
Inverted Minor Game Forcing
Criss Cross Invitational Values

Method 2
Criss Cross Game Forcing
Inverted Minor Invitational Values

Game
Forcing

1C - 2C;

1C - 2D;

Game
Forcing

1D - 2D;

1D - 3C;

Invitational

1C - 2D;

1C - 2C;

Invitational

1D - 3C;

1D - 2D;

The benefit of the Criss Cross convention is to differentiate invitational and game forcing hands with support in opener's bid suit.  Without Criss Cross, hapless players may find themselves going down in a 3 Notrump contract when responder has 9-11 points with a short suit.

Note: some players reverse the Criss Cross convention (Method 2), using Criss Cross to show an opening hand and bid Inverted Minors with invitational values. 

Also see Inverted Minors (raises).

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