1、最古老的就是 Mathe 约定：
Dbl = 双高
1NT = 双低
2、Dbl-1S = 转移
1NT = 双低
2m = m+H 5-5
2M = 弱二
2NT = 阻击
3X = 要打
3、2C = H+any
2D = S+m
1NT = 双低
Dbl = 竞叫，2C逼叫
4、1NT = S+any
2C = H+C
2D = H+D
2NT = C+D
5、Dbl = C+M
1NT = 无C两套
2NT = 双低
6、1NT = 双低
2C = m+M
2D = 双高
Dbl = 三套(可能5431)
7、Dbl = C
1NT = m+M 或 4441
2C = 双低
2D = 其他两套
8、Dbl = H
1D = S
1H = H+C or S+D(同顶)
1S = S+C or H+D(同色)
1NT = H+S or C+D(同级)
9、SUCTION
Dbl = D or H+S
1D = H or S+C
1H = S or C+D
1S = C or D+H
1NT = C+H or D+S
(规律：叫品转移单套和该单套下两级花色双套)
1NT 显示非贴邻两套
10、Dbl = C or D+H
2C = D or H+S
2D = H or S+C
2H = S or C+D
2S = S+D
2NT = 强双套
11、Dbl = 4-4M 或 强牌
1D = H or S+C
1H = S or C+D
1S = C or D+H
1NT = S+D or H+C
2C = D or H+S
2D = 6H or S+C(55+以下同)
2H = S or C+D
2S = C or D+H
2NT = S+D or H+C
12、 1D = 双高
1NT = 双低
2D = 单套高花
1M = 4M
13、Dbl = H+S or C+D(同级)
1D = H+D or S+C(同色)
1NT = 6C or 5D+5M
2C = 6D or 5C+5D
2D = 6H or 5S+5m
2H = 5H+5S
2NT = 两套
14、Dbl = 双高
1NT = 双低
1D = D+H
1H = S+C
1S = H+C or S+D
15、CRASH
Dbl = S+C or H+D(同色)
1D = H+S or C+D(同级)
1NT = S+D or H+C(同形)
1C-1D后用Dbl/1NT/2C
16、Dbl = 好牌
1NT = 5C+4M
2D = 5M+5other
2NT = 5C+5D
17、Dbl = 双高
1NT = 双低
1D = D or S
1H = H or C
1S = 3套牌
18、Yeslek
Dbl = D or H+S
1D = H or S+C
1H = S or C+D
1S = C or D+H
1NT = C+H or D+S(对波兰1C=15-18NT)
2C = D or H+S
2D = H or S+C
2H = S or C+D
2S = C or D+H
2NT = C+H or D+S
3X = AQJ10xx
强牌先pass(实际上就是两轮的SUCTION)
19、Dbl = D or H+S
1D = H
1H = S or C+D
1S = 4+S-5+m
1NT = 6X
2C = 4+H-5+C
2D = 4+H-5+D
20、Dbl = 套/首攻
1NT = 双高
2X = SUCTION
21、Dbl = 双高 或 好牌
1NT = S+D
2D = D+H
2H = H+S
2S = S+C
2NT = C+D
3C = C+H
