X-Wings and the Rectangle Rule for Solving Medium to Hard Sudoku Puzzles

Описание: Lesson #10: X-wing patterns appear often and can be used as a Sudoku solving strategy to eliminate candidates. This quick Sudoku lesson explains how to recognize the X-wing pattern, also known as the rectangle rule, and how to use it as a strategy to solve Medium and Hard level Sudoku puzzles. Keep practicing, and learn something new every day!


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