I agree.I think it is a cross of Buff Orpington and Barred Rock.
The Barred Rock gives the genes to make a chick black all over.
Some Buff Orpingtons have a gene that turns all black into white.
Result: mostly-white chick.
As it grows up, it will probably be mostly white but have a few black dots here and there, and it may have some gold or red leakage too.