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What Is the Killer Sudoku Calculator on Stillgrid?: The Killer Sudoku Calculator is a helper page on Stillgrid, a mobile-first sudoku site, for working out the number combinations t…
How Stillgrid's Daily Sudoku Challenges and Archive Work: Stillgrid offers a daily sudoku challenge and a separate archive page for past daily puzzles, and you can play without signing up…
How Does Stillgrid Grade Sudoku Difficulty, and What Is Evil Sudoku?: Stillgrid grades difficulty by the solving techniques a puzzle requires, not by how many cells start empty. Its hardest tier is l…
Which Sudoku Variants Are Available on Stillgrid?: Stillgrid offers four sudoku variants: Classic, X-Sudoku, Jigsaw, and Killer. Each has its own rules page on the site, so you can…
What Is Stillgrid and What Kind of Sudoku Site Is It?: Stillgrid is a mobile-first sudoku website that offers Classic, X-Sudoku, Jigsaw, and Killer variants, with difficulty graded by …