▁k its ▁to ▁build ▁their ▁rob ots . ▁In ▁more ▁recent ▁years , ▁especially ▁at ▁the ▁World ▁Championships , ▁some ▁teams ▁have ▁been ▁using ▁more ▁advanced ▁technology ▁and ▁designs ▁in ▁their ▁rob ots . ▁Custom ▁printed ▁circuit ▁bo ards , ▁actu ator ▁devices ▁( for ▁kick ing ), ▁cam eras ▁and ▁advanced ▁micro ▁controllers ▁have ▁become ▁common ▁place ▁at ▁the ▁international ▁competition . ▁ ▁Res cue ▁Line ▁| ▁Maz e ▁challenge ▁Since ▁in ception , ▁the ▁rescue ▁challenge ▁has ▁gone ▁through ▁a ▁number ▁of ▁iterations , ▁increasing ▁in ▁difficulty . ▁A ▁map ▁of ▁Australia ▁was ▁used ▁to ▁demo ▁the ▁rescue ▁challenge ▁initially ▁( and ▁was ▁subsequently ▁used ▁in ▁Australia ▁for ▁a ▁number ▁of ▁years ). ▁ ▁Sub sequently , ▁this ▁was ▁changed ▁to ▁a ▁number ▁of ▁white ▁t iles ▁with ▁black ▁lines ▁marked ▁on ▁them , ▁which ▁the ▁robot ▁had ▁to ▁follow . ▁ ▁Intern ation ally , ▁this ▁was ▁replaced ▁with ▁a ▁set ▁of ▁" rooms " ▁that ▁the ▁robot ▁had ▁to ▁search ▁and ▁move ▁through ▁by ▁following ▁a ▁line ; ▁then ▁added ▁with ▁an ▁ev acu ation ▁room ▁for ▁" v ict ims " ▁( color ed ▁balls ) ▁recognition . ▁▁ ▁In ▁ 2 0 1 1 , ▁Maz e ▁was ▁introduced ▁as ▁an ▁additional ▁sub - le ague . ▁Maz e ▁is ▁new ▁competition ▁without ▁lines ▁where ▁the ▁robot ▁had ▁to ▁detect ▁heat - em itting ▁ ▁and ▁visual ▁" v ict ims ". ▁ ▁In ▁additional ▁robot ▁is ▁required ▁to ▁drop ▁a ▁" res cue - kit "