Sudoku Theory

This page is a hub for theory about Sudoku - properties of puzzles or solutions, enumeration of grids, etc. - rather than theory for solving Sudoku (see Solving Techniques for that), though there is of course some overlap.

Topics

• Essentially Different Puzzles, Symmetry Groups, Canonicalization
• Number of Solutions
• Minimal Constructions (see also Snipes; not to be confused with Minimal Puzzle)
• Fractional Dimension
• SET Equivalence Theory