Suppose you do allow a 2-level response with a weak hand. What does opener then do?
If they have a balanced hand without support for responder's suit, their only options are:
Lie about their distribution
Pass
Bid NT
Lies about distribution can obviously get you into a world of pain, so should be used very sparingly. If opener wants to pass, the question arises: what is the strongest hand partner could have? Or, equivalently, what should partner bid if they don't want me to pass? New suit forcing for one round is a simple and effective principle; can you think of an attractive alternative?
So opener wants to rebid NT. Now: at what level? Working out whether game and/or slam is on has suddenly become a lot less precise.
Again, similar considerations apply in suits, they're just harder to reason about.
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Date: 2013-07-03 04:00 pm (UTC)If they have a balanced hand without support for responder's suit, their only options are:
Lies about distribution can obviously get you into a world of pain, so should be used very sparingly. If opener wants to pass, the question arises: what is the strongest hand partner could have? Or, equivalently, what should partner bid if they don't want me to pass? New suit forcing for one round is a simple and effective principle; can you think of an attractive alternative?
So opener wants to rebid NT. Now: at what level? Working out whether game and/or slam is on has suddenly become a lot less precise.
Again, similar considerations apply in suits, they're just harder to reason about.