Killer Sudoku

Killer Sudoku is a challenging Sudoku variant where cells are divided into cages with given sums. The app offers nursinghomeideas.com 4x4 and 6x6 puzzles for beginners, and 8x8 and 9x9 puzzles at 23 levels for experts. It includes features such as automatic notes, drag and drop entries, sum calculator, cage summer, and hints to assist players.