Opener Rebid

Here is your hand:

♠Q3
♥KJ7
♦AJ84
♣K643

Playing matchpoints and everyone is vulnerable. The Opponents are silent during the auction.

You are Dealer and open the bidding 1♦. (People tend to open 1♦ with 4-4 in the minors.) Partner responds 1♠. What is your call?

Show Answer

How about 1NT?

This gets across the fact that you are balanced. (Which you are.)

This also lets Partner know that you have less than 15 HCP. Why? Because with 15 HCP and a balanced hand you would open the bidding 1NT.