Easy as Japanese Sums by Salih Alan
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Theme: Almost All Triples
Author/Opus: This is the 19th puzzle from guest contributor Salih Alan.
Rules: Fill some cells with numbers 1-5 so that each row and column contains each number from 1 to 5 exactly once as well as three empty cells (1-4 and two empty cells in the example). Numbers outside of the grid indicate the sum of all numbers in the first connected group in that direction as in a Japanese Sums puzzle.
Difficulty: 4.5 stars
Time Standards (highlight to view): Grandmaster = 8:30, Master = 17:15, Expert = 34:30
Solution: PDF and solving video.
Note: Follow this link for other Japanese Sums puzzles.