Some are easy to figure out, like the clues in a newspaper’s Monday crossword, a beginner’s Sudoku grid or cryptogram. Others are more difficult. But one puzzle that has proved impossible to solve, ...

Sudoku is here, so sharpen your pencils, unless you're into the ink challenge. While puzzle junkies like Harv Hartman, a Chronicle reader in Nassau Bay, rejoice over today's addition to the ...

This article was originally on a blog post platform and may be missing photos, graphics or links. See About archive blog posts. Reader Evelyn Skillington made her point plain. Her e-mail had only the ...

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 ...

AI Factory Sudoku is an above-average Sudoku game developed by a fairly reliable developer. The game includes 1,500 Sudoku puzzles across five difficulties. Additionally, the game offers stat tracking ...

The rules of Sudoku dictate that every row, column and 3×3 bolded box in the completed grid must contain the digits 1 through 9 exactly once. A surprising fact emerges from these simple rules. In ...

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 ...

Puzzles have long been a favorite pastime for those looking to challenge their minds, improve cognitive function, or simply unwind with an engaging activity. Among the most popular are Sudoku and ...