Jigsaw Sudoku-X Puzzle Books

Jigsaw Sudoku-X Puzzle Books – 250 Extreme Puzzles

  Welcome to the Jigsaw Sudoku-X Puzzle Books Series. The puzzles in the “Extreme” version are ideal for experienced solvers that have knowledge of advanced solving techniques. Even though the puzzles in the “Extreme” version are very difficult to complete, each one can be solved with logic and advanced solving techniques, unlike some extreme puzzles …

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Jigsaw Sudoku-X Puzzle Books – 250 Hard Puzzles

  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 …

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