| Chain sudoku, what do you prefer? | |
| Chain sudoku without 3x3 boxes (see example below) | Gotroch |
| Chain sudoku without 3x3 boxes (see example below) | debmohanty |
| Chain sudoku without 3x3 boxes (see example below) | vopani |
| Chain sudoku without 3x3 boxes (see example below) | neerajmehrotra |