Leaping Michael之後 直接叫兩門其中一門一局=min, often S/O
叫別的是kickback rkcb =not min
Ex.1N-(2H)-4C! 4D=C rkcb
4S=S/O
4N=S rkcb
5D=S/O
others=double fit, 示叫
1N-(2H)-4D! 4H=D rkcb
4N=S rkcb
Leaping Michael使用時機: 1.開叫1N被插叫 only responcer
2.被開弱二或爛二 both
3.開叫1M被插叫 only responcer
4.開叫1C!被插叫 both
5.開叫1D!被插叫 only responcer