Sudoku 4000 & Solver vs Number Place Class Usage & Stats

It is a Sudoku app that can be enjoyed by beginners to advanced players. When you sove, who solve with as few notes as possible, who suddenly write notes and solve them, who use temporary storage a lot, There are many ways to enjoy Sudoku, It is an application that various people can enjoy. Advertising is a free Sudoku game that will not be displayed unless you go to see it yourself. It has the following features. 1.You can check if there are any mistakes on the way. (!check) 2.You can reset the game if you find a mistake in the early or middle stage and there are many mistakes. (RESET) 3.If you get stuck, a polite hint will be displayed. (? Hint) 4.You can color the memo numbers you wrote down. (Press and hold a number in memo mode) 5.You can make problems such as magazines or newspaper, you can enjoy it anywhere without a pencil and eraser. When entering numbers in pen mode, make sure that there are no mistakes, twice or three times. please put it in. Every quiz has one solution.