A LITTLE ORDER IN THE CHAOS
Find the digits.
Discover the regions.
Give us the edge sums. Solve right here in your browser.
Your puzzle
Start at the top-left edge and go around the grid.
Separate numbers with commas, spaces, or new lines. Each sum is between 1 and 45.
Paste a puzzle ID (such as E45u) or a Sudoku Coach link. English and Chinese links both work.
We’ll show the imported numbers so you can check them before solving.
The rules, in a nutshell
Place the digits 1–9 once in every row, column, and region. There are nine connected regions of nine cells each. Their shapes are part of the puzzle.
Each outside clue is the sum of the digits along that row or column, starting at the edge and stopping at the first region boundary.
The regions are hidden. That’s where the fun begins.
Follow the reasoning
Step 0 / 0Ordinary logic first. If it stalls, test one assumption, make one breakthrough, then return to ordinary logic.
Amber: changed cells · red: removed candidates · thick line: region boundary · green mark: same region
What changed in this step
TEMPORARY ASSUMPTION BOARD