LEAD WITH THE ACES

ANSWER: This hand appears to be a simple raise of diamonds, but is that call forcing or invitational? For simplicity’s sake, I suggest that after a reverse, responder’s raise of either of opener’s suits be played as forcing. This in turn means that weak hands must do something else. You can play two no-trump as artificial and weak, or you can play the cheaper of fourth suit and two no-trump as weak; both methods work.