Author/Opus: This is the 4th puzzle from guest contributor Ashish Kumar.
Rules: Standard Sudoku rules. Also, digits in circles must be odd and digits in squares must be even.
Answer String: Enter the 4th row from left to right, followed by a comma, followed by the 7th row from left to right.
Time Standards (highlight to view): Grandmaster = 5:45, Master = 8:00, Expert = 16:00