[重点]主攻162738头,主攻493827尾.
1,排除490头,510百,160十,051尾.
2,铁卒:31,36,81,86.
3,三字现:314,319,364,369,814,819,864,869.
4,二定:2XX3,2XX8,7XX8,7XX3,X43X,X48X,X93X,X98X,XX43,XX98.
5,三定:2X43,2X48,2x98,2X93,7X43,7X48,7X93,7X98,X443,X498.
6,直码:2443,2448,2493,2498,2943,2948,2993,2998,7443,7448.