Variant Sudoku: Not Your Average Number Puzzle

Everyone knows sudoku is enjoyable—but these addictive puzzles come in endless variations too! They range from simple to very difficult, and can take

Sudoku Variants

Mini Quad Sudoku : Sudoku variants

The 10 Hardest Logic/Number Puzzles

Math Games:Sudoku Variations

Everyone knows sudoku is enjoyable—but these addictive puzzles come in endless variations too! They range from simple to very difficult, and can take

Sudoku Variants

A sample 4 × 4 Sudoku puzzle with enumerated candidate sets. Circle

What Is Sandwich Sudoku? - Mastering Sudoku

There's an obvious pattern in this nonconsecutive puzzle, am I “allowed” to use it? : r/sudoku

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Sudoku Variants: Conceptis Puzzles: 9781402741111: : Books

Sudoku Variants: Conceptis Puzzles: 9781402741111: : Books