Killer Sudoku Tips and Strategies: What to Scan First
Try a four-pass scan, decide when Notes will help, and understand the difference between Check and Hint.
From the grid
Killer Sudoku Blog
Practical notes for the moments when you know the rules but cannot see your next move. Each article focuses on a different part of playing; the full rules and quick-reference tables live in our Killer Sudoku rules guide.
Killer Sudoku Hard: What Actually Makes a Grid Hard
Understand how cage sizes, totals and positions affect your opening moves, and keep deductions separate from guesses.
Free Killer Sudoku: What to Check Before You Play
Check accounts, saved progress, puzzle refreshes, difficulty labels and advertising before settling into a daily habit.
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