
ACTUAL GAME SCREENSHOT
ABOUT THE GAME
About Sumline: Cross Sums
Sumline is a cross sums puzzle you can solve at your own pace. Choose from three board sizes, use notes to explore possibilities, and return for a date based daily challenge.
Explore category: Logic Puzzle Games
How to play
Select a light square and enter a digit from 1 to 9. The clue at the left is the sum of the across run; the clue above is the sum of the down run.
Rules in this version
- Each light square holds a digit from 1 to 9.
- Each across or down run must add up to its clue.
- A digit cannot repeat within the same run.
Tips for playing
- Begin with two square runs whose sums are very low or high.
- Use intersecting runs to rule out candidates.
- Pencil in possibilities before committing to an answer.
Questions about this game
Do I need an account?
No. Your puzzle and statistics are stored locally in your browser.
How does the daily challenge work?
Every player gets the same catalog puzzle for each UTC date.
Game screenshots





