¨Puzzle 2

Went back to the Sudoku problem yesterday, and asked myself
if moving blocks of 3 rows or columns might help solving the
grid. Again, yes and no. Things are faster at first but before long
one is driven to mind-bending calculations in all dimensions.

Clearly, though, a Sudoku solution is unique. It makes me wonder if
I shouldn't switch up the rows and columns. Not sure whether where
the 2(...) shows up within its square is ultimately unique??!!