Shikaku vs Sudoku
Regions versus digits — same logic-only spirit.
Shikaku vs Fillomino
Area clues, but any shape is allowed.
Shikaku vs Tatamibari
Rectangles with shape symbols instead of numbers.
Shikaku vs Nurikabe
Numbered islands in a connected sea.
The Shikaku family at a glance
| Puzzle | You divide or fill… | Clues are… |
|---|---|---|
| Shikaku | Rectangles | Areas |
| Tatamibari | Rectangles | Shape symbols |
| Fillomino | Any-shape regions | Region sizes |
| Nurikabe | Islands and a wall | Island sizes |
| Sudoku | Digits | Given digits |
Other Nikoli classics worth exploring include Kakuro, Hashiwokakero, Slitherlink, Masyu and Heyawake. Learn more about Shikaku’s place in this family in our history of Shikaku, or go deeper into Shikaku itself in the learning centre and strategy guide.