Extra Region Sudoku (Fun With Sudoku #174)

Extra Region Sudoku puzzles are standard Sudoku variation very near to Classic Sudoku puzzle where some Extra Regions of some cells are provided in the grid. These Extra Regions contains the unique digits i.e. no number is repeated in this given Extra Region. This Sudoku type was part of World Sudoku Championship 2015 (WSC 2015) and many puzzles of this type came in this championship. Currently, there are very few Sudoku puzzles of this type published here. However, I have prepared many puzzles of this type for preparations of WSC 2015 which I will be posting soon. On this page, I will be giving links to all these puzzles. 

Rules of Extra Region Sudoku

Classic Sudoku Rules apply. Additionally, each group of nine coloured cells must also contain the numbers 1 to 9.

Extra Region Sudoku (Fun With Sudoku #174)

Extra Region Sudoku (Fun With Sudoku #161)

Extra Region Sudoku (Daily Sudoku League #149)

Extra Region Sudoku (Fun With Sudoku #140)

Extra Region Sudoku (Fun With Sudoku #130)

Extra Region Sudoku (Fun With Sudoku #74)

Extra Region Sudoku (Fun With Sudoku #65)

Extra Region Sudoku (Daily Sudoku League #26)

Rules of 6x6 Extra Region Sudoku

Mini Classic Sudoku Rules apply. Additionally, each group of six coloured cells must also contain the numbers 1 to 6.

Extra Region Sudoku (Mini Sudoku Series #83)

Extra Region Sudoku (Mini Sudoku Series #74)

Below are the Extra Region Sudoku Variations. Rules of these variations are mentioned on the respective pages.

Liar Extra Region Sudoku Puzzle (Daily Sudoku League #189)

Checkout more Sudoku Variations by clicking on the below image

Sudoku Variations Main Page