Zoshy is a very interesting sudoku game. You can play anytime you want when you are bored.Zoshy provide 3 modes for you:Easy, Midium, Hard.Choose the level that suits you.Challenge to hard levels.Skill #1 Unique number methodIf we find that there is only one available candidate number in a certain grid, then this grid must be this number. This is the unique numbering method.Skill #2 Implied unique number methodIf we find that there is a candidate number in a certain row, a certain column or a certain Jiugong that only appears in one grid, then this grid must be this number. This is the implicit unique numbering method.Skill #3 Number pair methodIf we find that there are only two candidate numbers for two grids in a certain row, one column or a certain nine squares, then these two grids must be exactly these two numbers, then in this unit (row, column, or nine squares), These two candidate numbers will not appear in other grids. This is the number pair method.