Low-High Sudoku

Low-High Sudoku is a variant of the classic Sudoku puzzle. In this variant, each cell contains a number within a specific range.

Low-High Sudoku

Rules: In each cell of the NxN grid, enter a number in the range 1–N. Each number must appear exactly once in each row, column, and block.
Additional rules: The cells cells with numbers 6, 7, 8 and 9 marked with squares.