Cross Sums
Every run adds up to its sum, no digit twice.
NumbersClassic and Blitz5 levels
The rule
1
Fill the white cells with the digits 1 to 9.
2
Each run adds up to its sum exactly, with no repeated digit.
3 in two cells: 1 and 2. 4 in two cells: 1 and 3. The shared cell is 1.
Filou’s tip
Some sums split only one way: 3 in two cells is 1 and 2. Always start with those.
Two modes
Classic · one grid, no time limit. Your record is your time.
Blitz · as many points as you can before the bell, grid after grid.
Leaderboards
Every level and mode has its own leaderboard, among friends and worldwide (if you join). With every record, your new rank shows up.
