Hard Sudoku #1439756 https://www.livesudoku.com/en/sudoku/hard/1439756
Medium Sudoku #785455 https://www.livesudoku.com/en/sudoku/medium/785455
Beginners Sudoku #169728 https://www.livesudoku.com/en/sudoku/easy/169728
Beginners Sudoku #262243 https://www.livesudoku.com/en/sudoku/easy/262243
Hard Sudoku #1256794 https://www.livesudoku.com/en/sudoku/hard/1256794
Beginners Sudoku #204338 https://www.livesudoku.com/en/sudoku/easy/204338
Hard Sudoku #1062718 https://www.livesudoku.com/en/sudoku/hard/1062718
Medium Sudoku #719452 https://www.livesudoku.com/en/sudoku/medium/719452
Medium Sudoku #692821 https://www.livesudoku.com/en/sudoku/medium/692821
Beginners Sudoku #492009 https://www.livesudoku.com/en/sudoku/easy/492009