Contents of Key to solution for Slither Link

Key to solution for Slither Link

General rules


How to draw a line out of a corner of "1" when two "x" are already marked in L-shape


When two edges are already marked with "x" in L-shape as in this figure, let's think about the vertex placed diagonally from the L-shape corner.


A line comes from either top or left edge to the star marked vertex, so it extends to one of the remaining edge (right/bottom).

This part is same as the case of "3" (rule of drawing a line out of a corner of "3" when two lines are already connected in L-shape).

Drawing a line out of a corner of "1" when two "x" are already marked in L-shape

This is the opposite of the rule of drawing a line to a corner of "1".

This is not so useful by itself, but is very helpful in the following cases:


Contents of Key to solution for Slither Link