The reverse gap principle...

The "reverse gap" is a move I especially enjoy since it is so counter-intuitive to do if you come from a NLHE world. In the NLHE world, if someone in front of you raises, and you are the next to act, the gap principle kicks in. Meaning you should tighten your range of hands (the gap) with which you would call or raise with. In the limit world, if someone raises ahead of you and you are the next to act, you can and should loosen a bit and think about a re-raise. The idea being, the people behind the raiser are looking at one raise to call, but may still call with those baby connector hands or sooooted junk. If they now have to look at three bets, they are more likely to fold. This is a chance to not only eliminate the field, but also read hands, since a cold call behind you is likely to be suited connectors, and the original raiser re-popping you is likely to be strong.

The big advantage here is you can isolate on the original raiser and try to get the field limited. I think it's correct to do with even group two or three hands in order to get a better feel for the hand and to reduce opponents.

Of course, I could be wrong...