Considering the rules for minor suit limit raises, it is not likely for opponents to let a 2-minor contract to be played after the limit raise of minor opening to two-level and based on the experiences, playing the inverted minor suit raises are more beneficial. In this application, raising the minor suit opening to two-level is one round forcing and shows 9+ HCP with five-card fit or 11+ HCP with Hxxx fit. Raising the opening minor directly to three-level is a preemptive bid that shows 5-8 HCP with five card fit and unbalanced hand. Inverted minor raises are used after passing initially but standard application is valid if opponents interfere with overcall or double.
Raising the opening minor to three-level, is the last support bid that the responder can think of with a weak hand and 5+ cards trump fit. This prevents opponent’s interference at lower level by an overcall of a suit or double. In addition, bidding room is gained for the search of game or slam contracts by the two-level support raise being a forcing bid. The only disadvantage is to lose the chance to play at two-level and go to three-level when there is no interference by the opponents. But this is not likely considering todays modern bridge understanding. This application increases the trust between partners even if it means more work for them.