Supporting Responder's Major

OZ-STEPS
 
Special Developments After 1m Opener’s Raise of Responder’s Major Suit to Two-Level
 
When to Raise Responder’s Major with Three-Card Fit
 
* Over 1_ response, opener must rebid 1] with four spades and without four-card heart fit.
* Opener prefers 1NT rebid with Qx, Jx or AQ holdings.
* Opener prefers 1NT rebid with 3-2-4-4 or 3-2-3-5 distributions and Hx in other major. 
* Spade raise is acceptable with Kx, Ax or xx hearts and with good three-card fit
* Partner’s spade suit has to be raised to two-level with three-card fit and 3=4=1=5 or 3=1=4=5 
   distributions without enough strength for reverse.
* Partner’s heart suit has to be raised to two-level with three-card fit weak hands and 1=3=5=4 or 
   1=3=4=5 distributions, but it is better to rebid 2[ then raise hearts with 1=3=5=4 and ~16 HCP

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