Number Lines
Draw lines that add up to each circle
From each circle, draw a line over digits that add up to its number.
Lines never cross or share a cell. The circle itself is not counted.
Fill the board: every cell on a line, every circle's sum made.
Controls
- Drag from a circle to draw its line; its running total shows at the end.
- Drag back to erase. Press a line to cut it there.
- Keys: Enter on a circle picks its line, arrows draw, Backspace erases, Esc lets go; Ctrl/⌘+Z.
Start with small sums and corners: they have few ways to go.