or solve online (using our beta test of Penpa-Edit tools; use tab to shift between number entry and shading modes.)
Theme: Common Denominations
Author/Opus: This is the 415th puzzle from Thomas Snyder, aka Dr. Sudoku.
Rules: Place the numbers in the indicated range (1-6) 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.
Difficulty: 2.5 stars
Time Standards (highlight to view): Grandmaster = 2:30, Master = 4:00, Expert = 8:00
Note: Follow this link for other Japanese Sums puzzles.