[JeffMorrow]

Recently, sitting second seat, my RHO opened 2♦. My distribution was 5=6=1=1. I bid 3♦ intending to show both majors. In the later autopsy, my partner asked whether it was standard to use Michael’s against preempts. I said I had no clue. Then I wondered if if it was not standard, why. Of course, one reason not to use it in this case was that I had longer hearts than spades, but my questions are general.

Is there a reason not to use Michael’s against preempts?

Should you use Michaels if you are 6/5 in the majors?