Solve sudoku puzzle using the cross hatching, either/or, and pairs technique. If you can use a magic marker, and feel competent enough, then why not try it out?
Written explanation at http://www.sailingtexas.com/Sudoku/sudoku.html
Apple's iOS 26 and iPadOS 26 updates are packed with new features, and you can try them before almost everyone else. First, check Gadget Hacks' list of supported iPhone and iPad models, then follow the step-by-step guide to install the iOS/iPadOS 26 beta — no paid developer account required.
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