Allow us to see this in slightly depth. We will enumerate the doable digit subset or DS for empty mobile R8C1 in the following Sudoku match. Grid Construction: The puzzle includes a 9x9 grid, and this grid is more divided into 3x3 subgrids or regions. +-------------------------------+-------------------------------+-------------------------------+ You may also use https://samuelv976amx8.wikifordummies.com/user