My partner and I use this, we came up with this to be able to show shortness by either opener or responder 1M -2C: Limit Raise with 3 or 4 trump ----2D: Full opener, asks for more info ------2M: 3 trump, no shortness --------OM/3C/3D: opener's short suit game try -----------3M: Responder's hand does not fit well with opener's shortness -----------4M: Responder's hand fits well with opener's shortness ------3M: 4 trump, no shortness, not 4333 shape ------2NT: 4 trump, 4333 shape ------2OM/3C/3D: 3 trump, shortness in OM/C/D ------3OM/4C/4D: 4 trump, shortness in OM/C/D ----2M: substandard opening, sign off (can be raised to 3 by hand with 4 trump) ----2OM/3C/3D: 5+ card side suit, 5 or fewer losers, slam interest ----3M: full opener, no shortness, slam interest, asks for immediate control bids ----3OM/4C/4D: shortness, 5 or fewer losers, slam interest ----4M: full opener, but no slam interest After opener bids a 2nd suit or shows shortness, a return to the Trump suit by responder shows no interest in slam. With interest, responder bids their cheapest 1st or 2nd round control.