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Sudoku articles

How to solve and make Sudoku and its variants: rules, step-by-step strategies and printable examples.

Last updated: October 18, 2026

Advanced Sudoku Variants Techniques for Harder Grids

Locked candidates for hard Sudoku X and Jigsaw grids, with moves checked on real LogikLand puzzles and a working method.

Last updated: October 18, 2026

A step-by-step plan for a Sudoku, Sudoku X, Jigsaw and Killer book for KDP, with calculated page counts and line widths and sourced KDP rules.

Last updated: October 18, 2026

Three beginner methods for irregular regions, with worked examples checked on real grids.