Hard Sudoku #1407503 https://www.livesudoku.com/en/sudoku/hard/1407503

Beginners Sudoku #72172 https://www.livesudoku.com/en/sudoku/easy/72172

Medium Sudoku #658815 https://www.livesudoku.com/en/sudoku/medium/658815

Medium Sudoku #828036 https://www.livesudoku.com/en/sudoku/medium/828036

Beginners Sudoku #154206 https://www.livesudoku.com/en/sudoku/easy/154206

Wicked Sudoku #1864881 https://www.livesudoku.com/en/sudoku/wicked/1864881

Beginners Sudoku #173426 https://www.livesudoku.com/en/sudoku/easy/173426

Wicked Sudoku #1643935 https://www.livesudoku.com/en/sudoku/wicked/1643935

Medium Sudoku #622517 https://www.livesudoku.com/en/sudoku/medium/622517

Beginners Sudoku #173426 https://www.livesudoku.com/en/sudoku/easy/173426