[重点]主攻162738头,主攻163827尾.
1,排除490头,490百,163十,054尾.
2,铁卒:31,36,81,86.
3,三字现:314,319,364,369,814,819,864,869.
4,二定:X3X1,X3X6,X8X1,X8X6,X34X,X39X,X84X,X89X,2XX6,7XX6.
5,三定:234X,239X,284x,289X,734X,739X,784X,789X,X396,X391.
6,直码:7341,7346,7391,7396,7841,7846,7891,7896,3341,3346.