Sudoku Variants
From Sudoku Theory
This wiki page provides an overview of common (and some less common) sudoku variants, organized into categories based on their characteristics.
List of Sudoku Variants
Other Geometries
- Samurai Sudoku
Differently Shaped Regions
- Jigsaw Sudoku (Irregular Sudoku, Nonomino Sudoku)
Chess Constraints
- Anti-Knight Sudoku
- Anti-King (no touch) Sudoku
- Anti-Queen / Bishop Sudoku
- Fairy-chess / general chess constraints
- Pro-chess constraints
- Manhattan / Taxicab distance
Extra Regions
- Windoku (Window Sudoku, Hyper Sudoku, NRC Sudoku)
- Diagonal Sudoku (Sudoku X, X-Sudoku)
- variant: Anti-Diagonal Sudoku
- Disjoint Groups Sudoku
- Hashtag
Arithmetic Constraints
- Killer Sudoku
- Sum Frame Sudoku
- Little Killer Sudoku
- Arrow Sudoku
- Variants with other operations (*, /, etc)
- Double arrows
- Inequalities
- Doublers
- Lunchbox
- Young Tableaux
Nonconsecutive Sudoku
- Non-Consecutive Sudoku
Line Constraints
- Renban (Consecutive Sudoku)
- German Whispers
- Chinese Whispers
- Dutch Whispers
- Modular Lines
- Region Sum Lines
- Palindrome Sudoku
- Thermometer Sudoku
- Slow Thermometers
- Between Lines
- Entropic Lines
- Parity Lines
- Product-Sum Lines
Outside Clues
- Sandwich Sudoku
- X-Sums Sudoku
- Numbered Rooms Sudoku
- Skyscraper Sudoku
- Serbian Sums
- Japanese Sums
- Full Rank
Indexing
- Row indexing
- Column indexing
- Box indexing
- Cyclic indexing
- Other indexing
- Friendly cells
Shading / Pencil Puzzle based
- Tapa
- Yin-Yang
- Masyu
- Akari
- Shimaguni
- Fillomino
- Slitherlink
- Norinori
- Nurikabe
- Nurimisaki
- Aquarium
- Nansuke
- Spiral Galaxy
- Star Battle
- Country Road
- Cave
Other Constraints
- Clone Cells
- Odd/Even Sudoku
- Magic Square Sudoku
- Quadruples Sudoku
- Fortress Sudoku (Minimum/Maximum Sudoku)
- Kropki Sudoku (kropki pairs)
- XV Sudoku
- Snakes
- Loops
- Chaos Construction
- Schrödinger Cells
- Entropy
- Fog of War
- Knightmare
- Look-and-Say
- Liar / Wrogn
- Pencilmark / Sukaku
- Knapp daneben
This list is by no means exhaustive, as new sudoku variants continue to emerge. Rules can be combined or modified to create hybrid variants.
