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Theme: Gordian Knot
Author/Opus: This is the 261st puzzle from our contributing puzzlemaster Serkan Yürekli.
Rules: Standard Thermo-Sudoku rules.
Answer String: Enter the 5th row from left to right, followed by a comma, followed by the 5th column from top to bottom.
Time Standards (highlight to view): Grandmaster = 4:00, Master = 5:30, Expert = 11:00