The Massive Book of Jigsaw Sudoku: 1000 puzzles (Jigsaw Sudoku Puzzle Books: The Irregular Matrix Series)

The Massive Book of Jigsaw Sudoku Volume 2 — Another 1,000 PuzzlesVolume 1 had such a strong reception that DJAPE published a second volume with another 1,000 Jigsaw Sudoku puzzles. Same format: five difficulty levels, each puzzle with its own unique squiggly region design, and the Law of Leftovers technique explained in the introduction.If you solved all 1,000 puzzles in Volume 1 and wanted more — here they are. Every puzzle in this volume is new and does not appear in the first book. The same satisfying difficulty cycling (Easy → Cool → Thinker → Brain → IQ) keeps the solving experience varied.Jigsaw Sudoku replaces the 3x3 boxes with irregularly shaped 9-cell regions. Each row, column, and jigsaw region must contain digits 1-9. The irregular shapes make every puzzle feel fresh and prevent the autopilot solving that can set in with standard Sudoku.1,000 puzzles. 8.5 x 11 inch pages. All solutions at the back. No guessing required. From DJAPE — 250+ puzzle books, PhD in Computer Science, Washington Post Samurai Sudoku every Sunday since 2006. Read more