16x16 Hard Sudoku – Vertical

For Sudoku diehards seeking the ultimate test, look no further than our Sudoku setup. Featuring an impressive 16x16 grid, it offers a colossal number of cells to fill in, combined with the complexity of Hard difficulty. This means you’ll need patience, attention to detail, and solid Sudoku strategies to ensure no duplicates appear in any row, column, or sub-block.

What’s more, our puzzle generator is 100% free. You can keep printing new variations for practice or competition, all with no hidden costs. If you decide to tweak your Sudoku session—maybe jump down to 9x9 or switch over to a Very Hard difficulty—just press the “edit settings” button. After you preview your changes, download the new PDF and you’re all set. Challenge yourself with this expansive format, and embrace the gratification of solving such a formidable puzzle on your own terms.