HOW TO PLAY
How to play Keep the Sum
Solve three number-grid puzzles by choosing which numbers to keep or cross out until every row and column reaches its target sum.
Controls
- Tap a number to cross it out or tap again to keep it; Check sums; 1–3: choose puzzle
- Arrow keys: move; Space or Enter: toggle; R: restart
Tips
- Compare each row and column target with its current total.
- A large number may need to be crossed out when a line exceeds its target.