Colour Killer X Sudoku — Knight Features

The normal rules of Killer Sudoku apply. In addition, both main diagonals (marked) and all cells of the same colour must also contain all the digits from 1-9.

Puzzle Maker Pro - Nonconsecutive Sudoku Other Squares

How To Play Killer Sudoku

005_Sudoku Style Puzzles — Knight Features

Killer Sudoku Rules - How to play Killer Sudoku

Anti-Knight Sudoku: Rules and Puzzle Book

Guy solves the most insane Sudoku puzzle : r/videos

Irregular Killer Sudoku — Knight Features

Colored Sudoku Set - Logic Game for Kids and Adult – Kubiya Games

Killer Sudoku Rules - How to play Killer Sudoku

Killer Sudoku. Anti - Knight - X Diagonal. 10 X 10. 250 Puzzles. Level Bronze., Andrii Pitenko Book, In-Stock - Buy Now

Puzzle Maker Pro - More Clues Add-On for Sudoku Other Grid Sizes

Nonogram - picture cross game - Apps on Google Play

Extra Region Killer Sudoku — Knight Features

Killer Sudoku - Puzzle Games • Game Solver