Sudoku with clues

Originally called Number Place, is a logic-based, combinatorial
number-placement puzzle. The objective is to fill a 9×9 grid with
digits so that each column, each row, and each of the nine 3×3
sub-grids that compose the grid (also called "boxes", "blocks",
"regions", or "sub-squares") contains all of the digits from 1 to 9.
The puzzle setter provides a partially completed grid,which for a
well-posed puzzle has a unique solution. Completed puzzles are always
a type of Latin square with an additional constraint on the contents
of individual regions. For example, the same single integer may not
appear twice in the same 9×9 playing board row or column or in any of
the nine 3×3 subregions of the 9×9 playing board.