[重点]主攻270516头,主攻164905尾.
1,排除头,384百,279十,238尾382
2,铁卒:14,19,64,69.
3,三字现:142,147.192,197,642,647,692,697.
4,二定:1X9X,6X9X,2X9X.7X9X,,0X9X,,5X9X,,X19X,,X69X.
5,三定:219X,269X,719X,769X,139X,189X,639X,689X,039X,089X.
6,直码:2191,2196,2691,2696,7191.7196,7691,7696,1394,1899.