After an opponents Unusual 2NT over call, the Unusual vs Unusual method is used as a defense. As usual (or in this case would it be as unusual?) many treatments are available. For example after partner opens 1S and RHO over calls 2NT:
Treatment 1:
X : Interest in defending a minor
3C: Strong hand with hearts
3D: Strong hand with Spade support
3H: Limited hand with hearts
3S: Limited hand with Spade support
treatment 2:
X: Interest in defending or limited
hand with hearts
3C: Limited spade raise
3D: Forcing spade raise
3H: Forcing with hearts
3S: Competitive less than limit
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