In some partnerships I play a multi-2
♦ as showing a weak two in a major, a strong two in a minor, or a balanced 20-22 count. The most common difficulty we have with it is when partner has a weak hand with both majors and wants to increase the level of pre-emption, but then risks pre-empting partner when they have one of the strong hand-types. A recent example was a fourth-hand multi, which is perhaps a separate case, but the problem occurs in all seats:
Matchpoint pairs, NS vul:
P - P - P - 2
♦
P - ?
It's likely that partner has a strong hand, but could just about have an intermediate two in a major. Do you ignore the possibility and bid 2
♥ to see what rebid you get?
In general what do you do with a 4=4-(3-2) shape with < 4 points when partner opens a multi in any position?
("The Mysterious Multi" claims be the comprehensive guide to the convention, but offers no help in this case.)