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