Theme: Half Full
Author/Opus: This is the 6th puzzle from guest contributor Swaroop Guggilam.
Rules: Standard Sudoku rules. Also, digits in circles must be odd and digits in squares must be even.
Answer String: Enter the 2nd row from left to right, followed by a comma, followed by the 8th row from left to right.
Time Standards (highlight to view): Grandmaster = 7:45, Master = 10:30, Expert = 21:00