Theme: Clue Symmetry and Logic
Author/Opus: This is the 279th puzzle from our contributing puzzlemaster Serkan Yürekli.
Rules: Standard Sudoku rules. Additionally, locate a snake (a 1-cell wide path) that connects the grey circles marked with 1 and 9. The snake cannot touch itself, even diagonally. All cells marked with white circles must be part of the snake. Along the path, the snake must pass straight through any cell with an odd number from the sudoku, and must make a 90-degree turn in any cell with an even number from the sudoku.
Answer String: Enter the 2nd row from left to right, followed by a comma, followed by the 5th row from left to right.
Time Standards (highlight to view): Grandmaster = 5:15, Master = 9:00, Expert = 18:00