EASY shows every tile · HARD hides one tile you reveal by solving
1
Every row and every column must add up to the same target. The sums sit in each lane on all four sides.
Σ
20
20
20
20
20
Σ
20
6
2
4
5
3
20
20
2
6
4
4
4
20
20
4
4
7
1
4
20
20
4
4
1
7
4
20
20
4
4
4
3
5
20
Σ
20
20
20
20
20
Σ
2
Tap two tiles to swap them. A lane turns green ✓ when it hits the target, or shows ▼/▲ if it's over or under.
Σ
17▲
20
20
20
23▼
Σ
20
3
2
4
5
6
20
20
2
6
4
4
4
20
20
4
4
7
1
4
20
20
4
4
1
7
4
20
20
4
4
4
3
5
20
Σ
17▲
20
20
20
23▼
Σ
3
In HARD, one tile is hidden and fixed — you can’t swap it (its lanes show +?). Solve the rest and it reveals its number! EASY shows every tile.