Sudoku isn’t just a casual pastime—it’s a world of logic mastery, extreme challenges, and even global competitions. From legendary puzzles that stump PhDs to advanced techniques like W-Wing and ...

Daily puzzlers would be quick to tell you that sudoku, Wordle’s mathematical cousin, is not as easy as it looks. The small grid, found often next to a word scramble or comic strip in a print newspaper ...

Pens, pencils and a facility with numbers. Also helpful: earplugs, plushies, a water bottle, calming herbal oil and the occasional “wild bifurcation” (a.k.a. a wild guess). Competitors at the World ...

Sudoku is arguably one of the best ways to spend a cold, rainy night at home by yourself. Solving a nine-by-nine sudoku square is a deeply satisfying — and often challenging — experience, and it’s for ...