Theme: Half and Half
Author/Opus: This is the 320th puzzle from Thomas Snyder, aka Dr. Sudoku.
Rules: Standard Sudoku rules. Also, digits in circles must be odd and digits in squares must be even. The range of this puzzle is 1-6.
Answer String: Enter the 1st row from left to right, followed by a comma, followed by the 6th row from left to right.
Time Standards (highlight to view): Grandmaster = 1:30, Master = 2:30, Expert = 5:00