Killer Sudoku by Serkan Yürekli
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Theme: The Last Ones (for patron Randiman Rogers; all cages end in 1, and symmetric clues add to 11)
Author/Opus: This is the 100th puzzle from our contributing puzzlemaster Serkan Yürekli.
Rules: Standard Sudoku rules. Also, the sum of the digits in each cage must equal the value given in the upper-left corner of that cage. Digits cannot repeat inside a cage.
Answer String: Enter the 2nd row from left to right, followed by a comma, followed by the 9th row from left to right.
Time Standards (highlight to view): Grandmaster = 10:00, Master = 25:00, Expert = 50:00
Solution: PDF; a solution video is available here.
Note: Follow this link for more Killer Sudoku and this link for classic Sudoku. More Killer Sudoku puzzles can be found in Killer Sudoku by Serkan Yürekli.
23:03 . Very hard and nice !
Three and a half days, more or less.