Author/Opus: This is the 298th puzzle from Thomas Snyder aka Dr. Sudoku.
Rules: Standard Sudoku rules. Also, if a grey circle is given between two adjacent cells, then the two numbers in those cells must be consecutive. (Note: not all grey circles are given; adjacent cells without a circle may contain either consecutive numbers or nonconsecutive numbers.)
Answer String: Enter the 1st row from left to right, followed by a comma, followed by the 9th row from left to right.
Time Standards (highlight to view): Grandmaster = 4:15, Master = 6:45, Expert = 13:30