This is an example of a OneStroke starting grid. The aim of a OneStroke puzzle is to draw all of the
lines in this puzzle without lifting your finger (or mouse) off the puzzle, i.e. in one stroke.
It is possible to lift your finger/mouse off the puzzle to have a think about your next move, but you
will need to continue from your last point.
Some lines will have arrows on them, and they have to be drawn in that direction. Some lines will be
dotted, and they will need to be traced twice.