Hebi-Ichigo #75
A number from the range 1–5 is to be entered in some white cells of the grid. The numbers form one or more connected, monotonically increasing number sequences in orthogonally adjacent cells (snakes).
Two number snakes may not be orthogonally adjacent (but diagonally).
A number in a black cell indicates which number on a white cell is seen when looking in the indicated direction of the arrow. Between the black cell and the number cell, there can be any number of empty white cells. A zero indicates that there is no number cell in the direction of the arrow.
No snake may look directly at another snake. The eyes of a snake are in the 1 cell, opposite the 2 cell. The snake sees to the next black cell or to the edge of the grid.