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.

Sudoku & Variants by Logic Wiz – Apps on Google Play

Irregular Killer Sudoku — Knight Features

Logic Wiz beautiful Sudoku, Play: , or download Logic Wiz free app from Apple app store or google play. App includes 9 variants: Classic, Killer. Sandwich, Thermo, Palindrome

How To Play Killer Sudoku

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Sudoku - Wikipedia

Anti-knight sudoku : Sudoku variants

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How to Solve Anti-Knight Sudoku Puzzles

Create Sudokus where adjacent cells switch from odd to even - Several difficulty Levels - Customizable font, colors, lines - Commercial Use Add To

Puzzle Maker Pro - Checkerboard Sudoku