Killer Sudoku by Grant Fikes
or solve online (using our beta test of Penpa-Edit tools)
Theme: Initial Impressions
Author/Opus: This is the 331st puzzle from our contributing puzzlemaster Grant Fikes.
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.
Difficulty: 3.5 stars
Time Standards (highlight to view): Grandmaster = 4:45, Master = 7:30, Expert = 15:00
Solution: PDF; a solution video is also 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.
Penpa: [EDITED to remove link as no author/linkback present to this page and our own Penpa version now listed.]
Superb puzzle.
8:58
Loved it cheers