How to Play
Delete numbers so each row and column adds up to the target number at the right and bottom. Circles are optional but helpful for marking definite keeps.
Sumplete
Better luck next time!
How to play Sumplete
Sumplete is a number logic puzzle game recently created in collaboration with ChatGPT! For a complete guide, see our How To Play Sumplete tutorial.
Like this kind of puzzle? We compared the top 10 number puzzle games and wrote head-to-head breakdowns for Sudoku, Kakuro, and KenKen. If you're just getting started, check out the 7 mistakes beginners make.
Sumplete is inspired by Sudoku, Kakuro, and Hitori, but with a twist.
In Sumplete, the twist is that each row and column also has a "sum clue" associated with it. This clue tells you the sum of the numbers in that row or column. For example, if the sum clue for a row is 21, then the numbers in that row must add up to 21.
By default, every number on the grid is an "unknown" state. Your goal is to identify which numbers to delete and which to keep to ensure that the sum in each column and row matches its corresponding "sum clue".
To mark a cell as deleted, click or tap once and you'll see an X.
To mark a cell as one you for sure want to keep, click or tap again and you'll see a green circle.
Click or tap one final time to reset to "unknown" state.
You'll need to keep track of the sums of each row and column as you go along to make sure you're on the right track.
Once you have successfully removed the correct numbers, the sum total on the right/bottom will light up.
Once all numbers on the right and bottom of the grid are lit up, you’ll have won the game!
What you'll see if you win a game
Try the Daily Challenges
When you're ready to race the clock, the Daily 5x5 gives you one puzzle per day — same grid for everyone. The Daily 7x7 is the harder version for players who want a bigger grid.
We put together a 10-minute brain puzzle routine and a breakdown of how number puzzles actually help your brain.
Frequently Asked Questions
What grid sizes are available in Sumplete Unlimited?
Sumplete Unlimited offers grid sizes from 3x3 (beginner) to 9x9 (expert). You can also choose from five difficulty levels: Easy, Medium, Hard, Expert, and Master.
Is Sumplete Unlimited free?
100% free, no login needed. Play as many puzzles as you want in any size and difficulty.
What size should beginners start with?
3x3 Easy. It takes about 30 seconds and teaches you the core moves. From there, bump up to 4x4 or 5x5. If you can beat the Daily 5x5 without hints, you're ready for bigger grids.
How does Sumplete compare to Sudoku and Kakuro?
It's grid-based like Sudoku and uses arithmetic like Kakuro, but flipped: instead of filling numbers in, you cross them out. Every row and column has a target sum, and you delete numbers until what's left adds up.
Can I track my stats and streaks?
Yes. Create a free Sumplete account to save your win streaks, track solve times, compete on the leaderboard, sync progress across devices, and access the full puzzle archive.