This is an example of a completed Lockout Line Sudoku Puzzle.

The grid contains a series of lines with a diamond shape at each end. The numbers at each end must differ by at least 4, and the numbers in the middle of the line can't be equal to, or be between the 2 numbers at the end.

You will see that there is a Lockout Line in the top-middle of this puzzle with a 2 and 6 in the diamonds at the end of the line. There is a difference of 4 between these two values. The 7 and 8 in the middle of the line are not between 2 and 6.