A four-cell route along the first row
Trace AWAY from 1 at row 2, column 1; 2 at row 1, column 1; 3 at row 1, column 2; 4 at row 1, column 3. Reading those cells in order gives A → W → A → Y, so the route first moves up and then travels right twice.
Only one change of direction is needed: the initial upward move becomes a straight two-step run to the right. The route spans two rows and three columns, visits four edge cells, and includes one corner. Once these four cells are assigned, 26 of the board’s 30 open cells remain for the other four paths.