Sudoku medium difficulty help - Puzzling Stack Exchange

I keep getting stuck on the NY Times Sudoku medium difficulty puzzles. I go through one number at a time and narrow down large box where that number can only be in two spaces. When I finish the nin

50 Sudoku puzzles/medium difficulty problem-solving/reasoning/critical thinking

Sudoku 600 Puzzles Hard to Expert: Ultimate Challenge Collection of Sudoku Problems with Two Levels of Difficulty to Improve your Game: Puzzles, BeeBoo: 9798614305550: : Books

Free and printable Sudoku puzzles for young and old to challenge and develop your logic and thinking skills.

MMC KENKEN - The World's Most Exciting Math and Logic Puzzle - for Nintendo Switch - Nintendo Official Site

SOLUTION: Sudoku puzzle book to boost your critical thinking and problem solving skills. - Studypool

Stock market heading for 'correction'? EconoMeter panel says yes — and no - The San Diego Union-Tribune

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Research on Sudoku Puzzles Based on Metaheuristics Algorithm by Shirley Wang - Issuu

How do they make Sudoku 'easy', 'medium', or 'hard'? Is it not just how many squares are revealed? - Quora

An analysis of Harmony Search for solving Sudoku puzzles - ScienceDirect