The responses to 2 are:
|Pass||At least 6 diamonds, no interest in the other suits or in bidding higher|
|2NT||Artificial and game-forcing, showing 11+ HCP and asking opener to further describe his hand (see below)|
|3||At least 6 diamonds, invitation to 3NT|
After an artificial 2NT query by responder, opener's rebids are as follows.
|3||4-4-1-4 shape, 11-13 HCP|
|3||4-4-1-4 shape, 14-15 HCP|
|3NT||4-4-1-4 shape, 14-15 HCP, and the king or ace of diamonds|
|4||4-4-0-5 shape, 11-13 HCP|
|4||4-4-0-5 shape, 14-15 HCP|
Responder's rebids are natural.
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