iQiQGame Killer Sudoku

iQiQGame Killer Sudoku is the puzzle variant where number givens are replaced by dashed cages. Each cage carries a small target number, and the digits you place inside it must add up to that total, using no digit twice within the same cage. As always, every row, column and 3x3 box must also contain the digits one to nine exactly once, so clue-free solving is possible but demanding. The game offers multiple difficulty levels plus a notes mode, hints, and instant highlighting of conflicting digits, so you can learn the technique at your own pace. An automatic verification switch checks your entries as you go, and you can pause, reset or print the grid at any time. Puzzles are generated on demand, so there is always a fresh board, and there is no download, no sign-up and no time limit.