A three-cell horizontal trace
Trace HOP from the bottom row by following these cells: 1 at row 5, column 3; 2 at row 5, column 2; 3 at row 5, column 1. Reading them in order produces H, then O, then P, so the word begins at the third column and finishes at the first column.
Both moves go left, giving this route no turns and one straight segment. It spans one row and three columns, and all three cells lie on an edge of the grid. The final P has one open orthogonal neighbor, while the starting H has three. Marking the route accounts for three open cells and leaves 15 for the remaining words. Check the reading direction before stopping: following the same three cells from the opposite end would reverse the letter order. The accepted trace begins with H and uses exactly two moves.