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Welcome to the Jigsaw Sudoku-X Puzzle Books Series. The puzzles in the “Hard” version are ideal for intermediate solvers that have some knowledge of advanced solving techniques. Each puzzle has a unique solution which can be completed using simple logic.

Although this difficulty level is described as “Hard”, some experienced solvers may find it too easy to complete, so, please read the full description to determine if this difficulty level is the right one for you. There is nothing more frustrating than purchasing a puzzle book only to find that it is either not challenging enough or too difficult to complete.

Jigsaw Sudoku-x follows the same rules as a standard Sudoku puzzle, the only differences between the two are; the 3 x 3 square boxes are replaced with irregular (Jigsaw) shapes and the two diagonal lines of shaded cells that run from corner to corner.

The aim of the puzzle is to fill the blank cells with the correct numbers. Each row, column, irregular shape and shaded diagonal must end up containing all of the numbers from 1 to 9. Each number can only appear once in any row, column, irregular shape and shaded diagonal.

The Jigsaw Sudoku X Puzzle Book series is available in the following difficulty levels: Easy, Medium, Hard, Very Hard and Extreme. All difficulty levels are available in the following formats: Sudoku, Jigsaw Sudoku, Sudoku-X and Jigsaw Sudoku-X

**How the Puzzles are graded:**

Difficulty levels are determined by the complexity of the methods used to deduce the correct solution: Each level (Hard, Very Hard & Extreme) necessitates a mode of deduction which was not required in the previous level. The “Easy” and “Medium” Difficulty levels require no advance solving techniques, however, in the “Easy” level, there will always be one or more cells that can be filled-in by scanning rows columns and irregular shapes, whereas, in the “Medium” level there is usually only one cell that can be filled-in at any one time.

Easy: Ideal for beginners or those that simply want a very easy to solve Jigsaw Sudoku-X puzzle. No Advanced solving techniques required.

Medium: A little more challenging than the “Easy” difficulty level. You may have to check a lot of rows, columns and irregular shapes before finding a cell that can be filled in. As with the “Easy” difficulty puzzles, advanced solving techniques are not required.

Hard: The “Hard” difficulty level puzzles do require some advanced solving methods to be employed. These puzzles are more suited to those learning to use more complex deduction processes and moderately experienced Jigsaw Sudoku-X puzzle solvers.

Very Hard:The “Very Hard” series is one step up from the “Hard” level, forcing the solver to use more complex deduction methods. This level is definitely one for the more experienced solvers and the Jigsaw Sudoku-X fanatic.

Extreme: As the difficulty level suggests, these puzzles are extremely difficult to complete. Unless you are an expert Jigsaw Sudoku-X solver, these puzzles may be too hard for you.

- 250 Hard Jigsaw Sudoku-x Puzzles
- Handy 6 x 9 inch Book Layout
- Easy to read (2 Puzzles per Page)
- Some Advanced Solving Techniques Required
- Ideal For Intermediate Solvers
- Solutions Included

#### Product details

**Series:** Jigsaw Sudoku x Puzzle Books – 250 Hard Puzzles (Book 1 of 5)

**Paperback:** 152 pages

**Publisher:** Independently published (May 17, 2019)

**Language:** English

**ISBN-10:** 1099086094

**ISBN-13:** 978-1099086090

**Product Dimensions: **6 x 0.4 x 9 inches

**Shipping Weight:** 10.1 ounces