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.
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
- Nori Nori
- 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
This list is by no means exhaustive, as new sudoku variants continue to emerge. Rules can be combined or modified to create hybrid variants.
