[一码当先]排列三21028规则推荐无错杀号：4
- 独胆
- 7
- 双胆
- 6,7
- 三胆
- 6,7,9
- 杀一码
- 4
- 杀二码
- 2,4
- 杀三码
- 2,4,8
- 五码组选
- 0,3,6,7,9
- 六码组选
- 0,1,3,6,7,9
- 定三跨度
- 4,6,9
- 杀二和尾
- 3,5
- 定四和值
- 8,12,20,21
- 包星两组
- *0*,*3*
- 直选定位
- 028,035,019
- 定位5*5*5
- 01289,02345,01389
- 定位杀四码
- 3567,1678,2457
- 胆拖
- 胆码：9,拖码：0,1,3,6,7
- 组选五注
- 019,036,563,677,950
- 组选十注
- 019,036,106,370,559,563,677,799,950,991
- 组选40注
- 006,007,009,036,037,056,057,066,067,069,079,099,116,117,119,136,137,139,156,157,167,169,177,199,336,337,339,359,367,369,567,577,579,667,669,677,679,699,779,799