1M - 1NT (2X) 後，X都是要殺，2NT = T/O，其他自然，加叫高花是塞，3X問擋
如果2X是人為叫品，在3M之前有真牌組的示叫是邀請
開叫答叫人都一樣
例：
1H - 1NT (2S) X = Penalty
2NT = T/O
3mH = NAT
3S = Ask for stopper
3NT = S/O
1H - 1NT (2D) = D+S
1H - 1NT (2D) X = Penalty
2H = NAT
2S = Inv+
2NT = T/O
3C = NAT
3DS = Ask for stopper
3H = NAT
3NT = S/O