Author/Opus: This is the 21st puzzle from guest contributor Ashish Kumar.
Rules: Standard Sudoku rules. Also, cells with a square contain an even digit; cells with a circle contain an odd digit.
Answer String: Enter the 1st row from left to right, followed by a comma, followed by the 5th row from left to right.
Time Standards (highlight to view): Grandmaster = 6:45, Master = 8:30, Expert = 17:00