90 Overlapping Sudoku Variation Puzzles and their solutionsOne puzzle per page which enabled larger fonts for the puzzlesMedium to Hard Difficulty levelOverlapping Sudoku grids of classical 9x9 Sudoku puzzlesThe classical 9x9 Sudoku grids are overlapping to form larger gridsMost puzzles are over regular 3x3 sub-grids (sub-domains)A few puzzles have irregular jigsaw sub-domainsMost puzzles have non-symmetric distributed initial cluesA few puzzles have the initial clues symmetrically distributed within the puzzle’s gridMultiple overlapping patterns of 2, 3, 4, and 5 individual 9x9 Sudoku gridsA total of 12 overlapping patterns over overlapping grids such as:- Twodoku Sudoku ( 2 overlapping 9x9 grids ; 3 overlapping patterns including Sensei Sudoku)- Tripledoku Sudoku ( 3 overlapping 9x9 grids ; 2 overlapping patterns )- Kazaguruma Sudoku ( 5 overlapping 9x9 grids ; 1 overlapping pattern )- Gatai Sudoku ( 3 overlapping 9x9 grids, also called Gatai-3 Sudoku )- Samurai Sudoku ( 5 overlapping 9x9 grids, also called Gatai-5 Sudoku )- Cross Sudoku ( 5 overlapping 9x9 grids )- Sohei Sudoku ( 4 overlapping 9x9 grids )- Flower Sudoku ( 5 overlapping 9x9 grids )- Butterfly Sudoku ( 4 overlapping 9x9 grids )Variety SudokuVariety Sudoku OverlappingOverlapping SudokuOverlapping Grid SudokuActivity Book Puzzle Book Sudoku OverlappingNumber PuzzlesMath Puzzles. .