Theme: In Memory of Florian Kirch (FK)
Author/Opus: This is the 278th puzzle from our contributing puzzlemaster Serkan Yürekli.
Rules: Standard Tight Fit Sudoku rules. Also, digits within a grey square must be even and digits within a grey circle must be odd. The range of this puzzle is 1-9.
Answer String: Enter the 1st row from left to right, followed by a comma, followed by the 6th row from left to right. (Note: for the tight fit cells, enter the top before the bottom as would be normal for the read order.)
Time Standards (highlight to view): Grandmaster = 2:45, Master = 5:45, Expert = 11:30