or solve online (using our beta test of Penpa-Edit tools; use tab to shift between number entry and shading modes.)
Theme: Clue Symmetry and Logic
Author/Opus: This is the 127th puzzle from our contributing puzzlemaster Serkan Yürekli.
Rules: Hybrid of Japanese Sums and Latin Squares. Place a digit from 1-6 (1-4 in the example) into some cells so that each digit appears exactly once in each row and column. Numbers outside the grid indicate the sums of all adjacent digits in order in that row or column.
Answer String: Enter the 2nd row from left to right, followed by a comma, followed by the 8th column from top to bottom. Use a capital X for empty cells.
Time Standards (highlight to view): Grandmaster = 4:45, Master = 7:30, Expert = 15:00
Note: Follow this link for other Japanese Sums puzzles.