The Skudo blog
Sudoku writing from the team behind Skudo: how to get faster, what the puzzle does for your brain, and honest comparisons with the other apps people ask about.
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Five habits that keep you slow at Sudoku
Most people who feel stuck at Sudoku are not missing a clever technique. They are repeating one of five ordinary habits that quietly cost them the whole puzzle.
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How the daily Sudoku challenge works
One puzzle a day, the same one for everyone, ranked by who finished first rather than who solved fastest — and the full solution published the next morning.
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The 16 Killer Sudoku cage sums worth memorising
Most Killer Sudoku cage sums have many possible digit sets, but sixteen have exactly one. Learn those and you get free digits on almost every grid you open.
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What Sudoku difficulty levels actually mean
Easy, Medium, Hard and Expert are not about how many numbers you start with. They describe which kinds of deduction the puzzle forces you to make.