In Competition

Opps double our 1 NT opening bid

1NT - (double for penalty) -

        Pass    =    TP, we will probably make it

        Rdbl    =    SOS, no 5 card suit

        2x      =    natural, 5+ card suit, TP

1NT - (conventional double) -

        Rdbl    =    for penalty

        Rubensohl (after they bid their suit)