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Jigsaw Sudoku vol. 4: 160 very twisted puzzles
Paperback
Series: Jigsaw Sudoku Books, Book 4
ISBN13: 9781480041233
Publisher: Createspace Independent Publishing Platform
Published: Oct 5 2012
Pages: 102
Weight: 0.32
Height: 0.21 Width: 6.00 Depth: 9.00
Language: English
The subtitle says very twisted and it delivers. By Volume 4, DJAPE has refined his Jigsaw Sudoku designs to be more creative and more challenging than the earlier volumes. The irregular regions are twistier, the solving paths are less obvious, and the puzzles reward solvers who have developed genuine fluency with the Law of Leftovers technique.
160 puzzles across multiple difficulty levels. Each puzzle has its own unique jigsaw region design - no two layouts repeat. The same rules as always: each row, column, and irregular 9-cell region must contain digits 1-9.
If you have solved Volumes 1-3, these puzzles represent a step up in design sophistication. If this is your first Jigsaw book, it works as a standalone - the rules are self-contained - but you may want to start with an earlier volume for a gentler introduction.
160 puzzles. 6 x 9 inch format. All solutions included. From DJAPE - 250+ puzzle books, PhD in Computer Science, Washington Post since 2006.
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