# Jigsaw Sudoku 12 x 12 – 200 Very Hard Puzzles

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Bored of 9 x 9 Jigsaw Sudoku? Why not try your solving skills at 12 x 12 Jigsaw Sudoku?

In my 12 x 12 Jigsaw Sudoku puzzles the grid is divided into irregular shapes that all contain 12 cells. The lines of cells running horizontally are called rows, and the lines running vertically are called columns.

Jigsaw Sudoku, also known as Geometric Sudoku, Nonomino or Irregular Sudoku, shares the same rules as a standard 9 x 9 Sudoku puzzle; however, in a 12 x 12 Sudoku puzzle there are 3 extra cells that must contain the letters “a”, “b” and “c”.

The aim of the puzzle is to fill the blank squares with the correct numbers and letters. Each row, column and irregular shape must end up containing all of the numbers from 1 to 9 and the letters “a”, “b” and “c”. Each number and letter can only appear once in any row, column and irregular shape.

The “Very Hard” version requires advanced solving techniques and is ideal for those wanting a more challenging puzzle than the “Hard” version provides.

With only 2 puzzles per page and a 7 x 10 inch layout, the 12 x 12 Jigsaw Sudoku Puzzle Book provides a large, clear puzzle area.

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, so, please read the full description of how the puzzles are graded before purchasing.

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, whereas, in the Medium level there is sometimes 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 12 x 12 Jigsaw Sudoku 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 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 fanatic.

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

• 200 Very Hard, 12 x 12 Jigsaw Sudoku Puzzles
• Handy 7 x 10 inch Book Layout
• Easy to read (2 Puzzles per Page)