When 1♠ doubled is passed back to partner, he has 4 main options:
- pass and bid a new suit have clear meanings
- he can bid 1NT
- he can redouble
What do these show?
Second question: your agreement about responder's pass of the take-out double is that it shows one of two hand types, either
a) a normal pass (about 0-6 HCP, no desire to show a long suit via a transfer or a weak spade raise), or
b) a full-blooded redouble i.e. 10+ HCP, singleton or void spade and 3+ cards in every other suit. Hands with game forcing values can redouble if they want to consult partner about the subsequent auction but redouble does not set up a forcing pass.
Does this agreement change the meaning of opener's xx or 1NT bids?
Benefits include:
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