Sudokyu。

sudokyu。 is the classic number puzzle in a softer world. fill the grid so every row, column and 3×3 box holds 1 to 9. finish all nine of a digit and kyu — a small nine-tailed fox — grows a tail. all nine tails: solved. the puzzles • four difficulties, from easy to very hard, made fresh on your phone • every puzzle has exactly one solution • graded by the techniques it needs, so very hard means x-wings, never guessing • a new daily puzzle every day, the same for everyone • relaxed, timer or countdown: play without a clock, chase the suggested time, or race it gentle tools • notes for pencil marks, undo and redo, erase • hints that explain why: "7 has just one home in this box" • optional mistake highlighting, plus matching-number and row/column highlights • your puzzle saves as you go every solve, a time-lapse watch your whole solve replay in seconds, then save it as a vertical video to…