Sudoku 129 -

He clicked his pen and looked at the grid.

End of examination.

(10 marks) Suppose an alternative version of Sudoku 129 has one given removed (specify which), resulting in multiple solutions. Explain why removing that given creates non-uniqueness by exhibiting two distinct valid completed grids consistent with the remaining givens. sudoku 129

But as his thumb brushed the header, he stopped. He clicked his pen and looked at the grid