Calculate possible digit combinations that sum to a target. Specify the number of digits and exclude or require specific numbers. View results and adjust parameters for different scenarios.
Allows users to fill 9×9 grids with numbers 1-9. Tap cells to input numbers. Take notes and use hints. Access unique levels. Track progress and train brain skills.
Solve puzzles with additional numbers outside the grid indicating the sum of cells between 1 and 9 in each row and column. Complete puzzles with varying difficulty levels. Track progress and view hints when needed.
