How to play Sudoku – The Washington Post
https://helpcenter.washingtonpost.com/hc/en-us/articles/115003676468-How-to-play-Sudoku
WEBHow to play Sudoku. The objective of Sudoku is to fill each row, column and sub-grid with exactly one of the possible entries (usually, the numbers 1-9). A conflict arises if you repeat any entry in the same row, column or sub-grid. To enter a number in the grid, click on the number on the left, and then click on the empty box you want to place ...
DA: 6 PA: 88 MOZ Rank: 72