or solve online (using our beta test of Penpa-Edit tools; use tab to shift between number entry and shading modes.)
Theme: Twenty20 Vision
Author/Opus: This is the 238th puzzle from our contributing puzzlemaster Prasanna Seshadri.
Rules: Place the numbers in the indicated range (1-9) in some of the cells so that no number is repeated in any row or column. Numbers on the outside of the grid indicate the sums of adjacent number groups in that row or column, in order. Each sum is separated by at least one unused cell. The adjacent question marks (??) show two-digit numbers, not two groups)
Difficulty: 3.5 stars
Time Standards (highlight to view): Grandmaster = 6:00, Master = 9:15, Expert = 18:30
Note: Follow this link for other Japanese Sums puzzles.