Ninewold

Ninewold is Sudoku on moorland paper. Every day brings one new puzzle, the same for every player, made from the date: easy early in the week, hard on Sunday. A twelve-step ladder climbs from easy to hard for practice. Every puzzle has exactly one solution and can be finished by logic alone, without guessing. Pencil notes clear themselves, finished rows, columns and boxes light up, and three mistakes end the puzzle. When you finish, copy a short result with your time and a 3x3 emoji map of your mistakes to share. It plays in the browser with a keyboard, mouse or touch.