※ 引述《leondemon (狗狗)》之銘言：
: 最近在開發新的叫牌制度
: 一般來說5張Spade/Heart分別開叫1S/1H
: 想問一下 有沒有5張Spade/Heart分別開叫1D/1C的人為叫品制度？
龍橋或Tresboof2003都是使用這類型的開叫，
但是Tresboof是HUM，所以開發完也只能孤芳自賞，
P: 14+, any shape.
1C: 8-13, 4+ hearts, h>=s, possibly longer minor, possibly 4-4 majors.
1D: 8-13, 4+ spades, s>h, could contain 4+ hearts, possibly longer minor.
1H: 0-8, any shape. Usually no 5-card suit except possibly clubs.
1S: 9-13, balanced, no 4cM unless 4-3-3-3.
1N: 9-13, 5+ diamonds, no 4cM. (Implies 6+ diamonds and/or 4 clubs).
2C: 9-13, 5+ clubs, no 4cM. (Implies 6+ clubs and/or 4 diamonds).
龍橋是呂昌所著，可以上網搜尋一下，我只記得1C/1D=4+H/S，1H/1S=4+C/D（印象中）
可以自行參閱。