Sudoku Tips
Pencil Marks in Sudoku: When and How to Use Them
Learn how to use pencil marks and candidate notes in Sudoku to solve harder puzzles faster. Step-by-step guide with examples…
Read article →Pick a difficulty and start solving. Your puzzle, notes and timer save automatically, so you can step away and come right back.
Learn how to use pencil marks and candidate notes in Sudoku to solve harder puzzles faster. Step-by-step guide with examples…
Read article →Master the Naked Quads strategy for expert Sudoku. Learn how to spot four cells sharing four candidates and eliminate impossible…
Read article →Discover how Sudoku exploded from a quiet Japanese puzzle into a worldwide obsession in the early 2000s, captivating millions of…
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