pencil marks — 20 posts
Learn how to solve Sudoku without guessing using scanning, pencil marks, hidden singles, and simple logic patterns that actually work.
Read article →A practical guide to solving Sudoku without notes, including when it works, when it breaks down, and how to switch to pencil marks without guessing.
Read article →Learn the difference between Sudoku clues and candidates, why one stays fixed while the other changes, and how this distinction makes solving easier.
Read article →Learn the real difference between naked pair vs hidden pair Sudoku, where each elimination happens, and how to use both patterns without guessing.
Read article →A practical beginner guide to crosshatching Sudoku, including what it is, how it works, when to use it, common mistakes, and how it connects to hidden…
Read article →Learn the hidden single Sudoku technique, how it differs from a naked single, and the fastest way to spot this beginner move without guessing.
Read article →Learn how to clean up Sudoku notes without erasing the whole puzzle. Fix messy pencil marks, rebuild candidates selectively, and recover control of the grid.
Read article →Learn how to use notes in Sudoku with a simple pencil mark routine that helps beginners avoid guessing and solve harder puzzles logically.
Read article →A practical guide to Snyder notation vs full notation in Sudoku, including when each note system works best and how to switch between them during a…
Read article →A practical Sudoku guide explaining when guessing is a bad habit, when it can be a last resort, and what logic-first steps to use before trying…
Read article →