[重点]主攻051627头,主攻492716尾.
1,排除493头,382百,490十,尾053
2,铁卒:41,46,91,96.
3,三字现:421,426,471,476,921,926,971,976,463.
4,二定:X41X,X46X,X91X,X96X,X4X4,X4X9,X9X4,X9X9.
5,三定:X414,X419,X464,X469,X914,X919,X964,X969,241X,246X.
6,直码:2414,2419,2464,2469,2914,2919,2964,2969,7414,7419.