Killer Sudoku is a captivating Sudoku variant that offers a refreshing twist to the classic game. Developed by Ian Sutton, this free iPhone game is perfect for Sudoku enthusiasts looking for a new challenge.

The game introduces the concept of cages, where groups of cells are combined and assigned a sum value. Your goal is to fill the cells with numbers from 1 to 9, ensuring that each row, column, and cage contains unique digits. With its clean and uncluttered interface, Killer Sudoku provides a seamless and enjoyable gaming experience.

Killer Sudoku offers a wide range of puzzles, starting from cute little 4x4 and 6x6 grids, ideal for beginners. These puzzles come with contextual hints that help you learn the techniques required to solve Killer Sudoku puzzles. As you progress, the game offers 23 levels of increasingly challenging 8x8 and full-size 9x9 puzzles, guaranteed to keep your brain engaged.

The app comes equipped with a host of features, including automatic notes, drag copy and repeat entries, a sum calculator, cage summer, progress validator, and hints. These features enhance your gameplay experience and provide you with the necessary tools to tackle even the most difficult puzzles.

If you're a fan of Sudoku and want to take your puzzle-solving skills to the next level, Killer Sudoku is the game for you. With its extensive collection of puzzles and user-friendly interface, this game will keep you entertained for hours on end. Download Killer Sudoku now and put your logical thinking to the test!