Daily Killer Sudoku
One killer sudoku a day, the same one for everyone.
How to play
- One puzzle a day — everybody is working on the same grid.
- Normal sudoku rules first: every row, column and 3×3 box holds 1 to 9, with no repeats.
- Each dashed cage must add up to the small number in its corner, and no digit repeats inside a cage.
- A cage with one square left is the way in: its total minus what you have filled gives you the number.
What it trains
- Adds mental arithmetic to sudoku’s logic — reasoning and adding at once
- One a day: a finished thing rather than an endless supply
- The hint teaches the cage technique rather than handing you the answer
A free daily killer sudoku: one puzzle a day, the same one for everybody, changing at midnight UTC. Normal 9×9 rules plus dashed cages that must add up to the number in their corner, with no digit repeated inside a cage — and no starting numbers, the way killer sudoku is meant to be. No ads, no account and no timer, with pencil marks, large print and a hint that explains the next step instead of filling it in. Plays on phone, tablet or computer.
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