dumbledore has beaten voldy moldy before
thou as confirmed in the films ablus never killed grindal (the wands owner before him) and was still able to defeat he with no nose. if albus had he would have obliterated even more then he already has/
voldermort did kill grindal but not albus who by that time had become the wands owner
in short voldy"child pedo" mort still looses as before