Goal: Fill the grid so every row, column and box contains each digit 1 to N exactly once.
Arrow rule Each arrow has a circled cell and a path. The circled digit must equal the sum of the digits along the path.
9
→
4
+
3
+
2
= 9
Tap a cell then tap a digit to place it. Toggle Notes ✎ to pencil candidates, Hint to reveal a correct cell, Undo to step back, Erase to clear.
Star targets: 3 stars = solve within the tier time limit with no mistakes and no hints. 2 stars = 1 mistake/hint OR slower time. 1 star = completed.
Every puzzle has exactly one solution, verified by a solver.