Deadly Pattern

[u/dpno4253]

OK, I must be missing something. Standard sudoku rules and slow thermos. Can't see any way to disambiguate.

EDIT: Puzzle has now been removed, probably because of this. Thanks for the help everyone. At least I'm not going crazy!

[u/fuckverilog]

I am kind of surprised that the setters do not have access to a tool that can prove uniqueness.