Archive Puzzles – 6 Hard Sudoku Puzzles – Books 21 to 30

Hard Difficulty Sudoku Puzzles

6 Sudoku Puzzles Per A4 Sheet of Paper

Puzzles for the Experienced Sudoku Player

Average Time Taken - Less than 30 Minutes

The hard puzzles are much more challenging and are recommended for experienced Sudoku players. These puzzles will have fewer numbers already entered. More advanced techniques will have to be used to complete these puzzles.

To view these puzzles you will need to use Adobe Reader which is free to use.

• 6 Hard Sudoku Puzzles – Book 21
• 6 Hard Sudoku Puzzles – Book 22
• 6 Hard Sudoku Puzzles – Book 23
• 6 Hard Sudoku Puzzles – Book 24
• 6 Hard Sudoku Puzzles – Book 25
• 6 Hard Sudoku Puzzles – Book 26
• 6 Hard Sudoku Puzzles – Book 27
• 6 Hard Sudoku Puzzles – Book 28
• 6 Hard Sudoku Puzzles – Book 29
• 6 Hard Sudoku Puzzles – Book 30

How To Play Sudoku

Sudoku is a puzzle game that first appeared in the 1970’s, but remained in relative obscurity until the early 2000’s. Since then it’s become a mainstay in newspapers across the world, and spawned dozens of offshoots and variations.

In Sudoku, the player is presented with a board consisting of 81 cells arranged in a 9x9 formation. The board is further broken down into 9 3x3 boxes. The goal of Sudoku is to use the numbers 1-9 in such a way that each row, column, and box has one of each of these digits, and only 1.

Each board comes with several numbers already scattered across the board, which cannot be changed, and set the tone for the entire puzzle.

Sudoku Strategies For Hard Puzzles