Japanese Sums by Thomas Snyder
This is a free “warm-up” puzzle; Season 4 subscribers will see today’s main puzzle in the same style posted at 9:05 AM PT.
or solve online (using our beta test of Penpa-Edit tools; use tab to shift between number entry and shading modes.)
Theme: Two and One
Author/Opus: This is the 512nd puzzle from Thomas Snyder, aka Dr. Sudoku.
Rules: Place the numbers in the indicated range (1-6 in the puzzle, 1-5 in the example) 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. A ? can represent any sum of 1 or larger.
Difficulty: 1.5 stars
Time Standards (highlight to view): Grandmaster = 1:15, Master = 1:30, Expert = 3:00
Solution: PDF and solving animation.
Note: Follow this link for other Japanese Sums puzzles.
Note 2: Comments on the blog are great! For a more interactive discussion, please also consider using our Week 6 Discussion post on the GMPuzzles Discord.