Line Segment is a logic puzzle invented by Erich Friedman (USA). The task is to draw line segments that pass through exactly 3 or 4 consecutive cells. The line segments can only be horizontal (H), vertical (V), or diagonal (D). Each cell must be visited exactly once. A cell with a letter contains a line segment with that orientation.
Cross+A can solve puzzles from 4 x 4 to 30 x 30.