Shameless plug for several free sudoku web sites with minimal ads: https://fiendishsudoku.com https://fiendishsudoku.com https://sudokuhints.com https://sudok

Shameless plug for several free sudoku web sites with minimal ads: https://fiendishsudoku.com https://fiendishsudoku.com https://sudokuhints.com https://sudokuhints.com https://extremesudoku.info https://extremesudoku.info https://easysudoku.org https://easysudoku.org Samurai: https://samurai-sudoku.com https://samurai-sudoku.com Printables: https://sudokuprintables.org https://sudokuprintables.org https://sudukopuzzles.org https://sudukopuzzles.org