The 4x Interactive Printable Blank Sudoku Puzzle Grids page includes four individual blank sudoku puzzle grids on one page. You can print the page "as is" or fill the grids with sudoku puzzles from your favorite newspapers or websites, and even solve or partially solve them right on this page prior to printing.
If you have clicked on the "toggle valid candidates" link above the puzzle, valid candidates will be shown in each puzzle block. The valid candidates are updated automatically as you enter numbers on the puzzle grid. If you logically eliminate an otherwise valid candidate, you can remove it by double-clicking it. If you later realize that you have removed it in error, double-click the same location again to restore the removed valid candidate.