In Competition

Opps overcall our 1 NT or 2NT opening bid 

After 1NT - (2♣ natural or conventional one suiter)    ➤    dbl = Heeman, other = system on

After 1NT - (2♣ showing both M)    ➲ 

After 1NT - (2♦/♥/♠ natural)    ➤    dbl = T/O, other = natural/Rubensohl

After 1NT/2NT - (2/3x natural)    ➤    dbl = T/O, GF, bid on level 3 = system off, bid on level 4 = system on

After 1NT/2NT - (2/3x transfer or "suction", where we ignore the 2 suiter possibility)    ➲      

After 1NT/2NT - (4x natural)    ➤    dbl = T/O, GF, bid on level 4 = system off, 4NT = TP