Curve Sums rules copied from Pedro PSI:
Fill all empty tiles with non-overlapping, possibly repeating, digits. Digits are drawn as the lines in 7-segment-displays. Digit segments may grow or shrink to any positive integer length. Clues sum every digit in the arrow's direction until the edge of the puzzle.
The example images on Pedro's site will probably be helpful.
Theme: 1s
Theme: Open Middle
