Free printable · Answer key included

Printable Hard Sudoku, Pack 3

Hard Sudoku for confident solvers: the fewest givens we print, and grids that reward careful candidate tracking.

Pack 3 of 3 has six Sudoku puzzles with an answer key on the second page. Each grid has 28 given numbers.

How to solve

  • Rows: Each row holds the numbers 1 to 9 exactly once.
  • Columns: Each column holds the numbers 1 to 9 exactly once.
  • Boxes: Each 3x3 box holds the numbers 1 to 9 exactly once.
  • Pencil marks: Write small candidates in the corners of a square, and rub them out as the grid fills.

Free to print and copy for home, classroom and library use. Every puzzle has one answer you can reach by logic alone.