Opener's Rebid after 1D-1S 16

Opener's Rebid after 1D-1S 16

Question:

You are South. Matchpoints. 

You hold: 

A2
2
AK876
AKJ32

What is your next call on the below auction:

  West    North    East    South  
   1diamonds icon
Pass1spades iconPass?

 


Answer: