Diagonal Numberlink is a surprisingly tricky variant of Numberlink, where instead of joining pairs of numbers with only horizontal and vertical lines you now can also use diagonal lines. Lines still need to always move between the centre of squares, and only one line can enter each square.
However, there is one key difference in the puzzle - now lines can cross! They can only cross on the intersection point between four squares, since only one line is allowed in any one square, but this variation instantly changes the logic needed to solve these puzzles. In solving terms, these are very different puzzles to regular Numberlink.
