He maha ngā hurihanga rerekē o tētahi raruraru ki tētahi atu, e mōhiotia ana hoki hei? I runga i te pātai o mua, tuhia he horopaki kei roto te whakautu. Ka taea te 1 - 20 rerenga kōrero. Te horopaki:
He maha nga akomanga uaua e tautuhia ana ma te whakamahi i te kaupapa o te whakaheke. Ko te whakaheke he hurihanga o tētahi raruraru ki tētahi atu raruraru. E hopu ana i te ariā kore o tētahi raruraru he uaua rawa atu i tētahi atu raruraru. Hei tauira, mēnā ka taea te whakaoti i tētahi raruraru X mā te whakamahi i tētahi hātepe papatono mō Y, kāore a X i te uaua ake i a Y, ā, ka kīia e whakaheke ana a X ki a Y. He maha ngā momo whakaheke, i runga anō i te tikanga whakaheke, pēnei i ngā whakaheke Cook, ngā whakaheke Karp me ngā whakaheke Levin, me te here i runga i te matatini o ngā whakaheke, pēnei i ngā whakaheke wā-pōrahi, whakaheke mokowā-rorohiko rānei.