Dumbledore/Grindlewald duel

[Charles Walker Jr]

No: HPFGUIDX 174530

Actually, to throw my $0.02 in, I thought that an unbeatable wand did
not necessarily mean an invincible wizard, despite the speculation of
Voldemort and others. I took the unbeatable wand to mean that it would
always cast any spell successfully in battle despite shield charms,
etc.  For example, any stunner would not be deflected by a protego or
any other shield charm. 

The reason I think that it does not make an invincible wizard is the
way it is said to change hands, which is by the defeat of the wizard
who owns it. DD must have recognized that GG had the elder wand and
outsmarted him by not using shield charms and rather using apparition
and other techniques to keep GG from cursing him.

Then again, maybe Rita was onto something. :-P

Charles, who thinks that winning the elder wand was done by
outsmarting Grindelwald, not overpowering him or his wand.