Theme: Clue Symmetry and Logic (This puzzle style was written for Chris Green, one of our Super Grandmaster patrons)
Author/Opus: This is the 215th puzzle from Thomas Snyder, aka Dr. Sudoku.
Rules: Standard Tile Sudoku rules.
Answer String: Enter the 1st row from left to right, followed by a comma, followed by the 7th row from left to right.
Time Standards (highlight to view): Grandmaster = 3:30, Master = 4:45, Expert = 9:30
Note: Follow this link for other Tile Sudoku.