Killer Sudoku archive
Every past daily killer sudoku, four levels for each date. Pick a day to play; the calendar marks the days you solved.
Today's puzzle
Loading ยท the grid and its level
(a small spoiler)
Checked: exactly one solution, reachable by logic. The level is the hardest technique our solver needed, not the grid size.
An example Killer Sudoku grid, ready to solve 20 dailies published so far; the archive starts with daily number 1 on 21 October 2026.