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Kids Hard 6x6 Sudoku

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Choose a number, and place it in the grid above.

  1 2 3 4 5 6
(Clear)
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How to Play Hard 6x6 Sudoku

To solve Hard 6x6 Sudoku, fill in the blank cells so that 1 through 6 occur only once in each row, column, and 2x3 block. There is only one correct answer for each puzzle, and you must use logic to solve it. The given numbers (pre-filled numbers) are your clues, and they help guide you toward the solution. As you fill in more numbers, the puzzle will become easier to solve.

Hard 6x6 is typically great for elementary-aged students. However, if it’s too tough, we offer easier kids’ Sudoku puzzles, and if it’s too easy we have 9x9 Sudoku grids.

Tips to Solve Hard 6x6 Sudoku

The hardest part of a Sudoku puzzle is knowing where to start and how to narrow down your answers, but it gets easier with practice and the right Sudoku strategies. Use these techniques to guide you through your puzzle and help level up your Sudoku game.

Hard 6x6 sudoku strategies

  • Start in units with the most givens. Focus on rows, columns, or 2x3 blocks with the most pre-filled numbers. These sections are the easiest to solve.
  • Focus on one number at a time. Concentrate on placing one number at a time throughout the puzzle. This is especially helpful if the number appears in multiple units. For example, if a 6 appears three times, there are only three more solutions left in the puzzle and you’re likely to be able to solve for multiple of them.
  • Use pencil marks to write down cells’ potential answers. This will help eliminate possibilities as you fill in the puzzle.
  • Use the process of elimination. Sudoku isn’t just about finding correct answers, it’s about eliminating incorrect answers. Narrow down possible solutions by erasing incorrect candidates as they become apparent.
  • Identify naked singles. A naked single is when only one possible number can go in a cell based on the existing numbers in a row, column, or block.

With practice, you’ll quickly improve your ability to solve Hard 6x6 Sudoku puzzles and level up to more difficult games. If you’re ready for your next challenge, you can explore all our free online Sudoku games and printable puzzles to continue to sharpen your skills.