Legged Robots
2.2 Legged Robots [Walkers] can weigh up to twice the specified weight in all classes. A walker must employ moveable legs to support its weight. Each leg must have at least 2 degrees of freedom.
Robots with rolling or sliding mechanisms will not be classified as walkers.
3.1.2 Walking such as linear actuator operated legs.


Above is the build rule about walkers.
What I would invite people to do is interpret these rules, to clarify exactly what they mean in the real world, and if possible give examples of what is and is not a walker under these rules.

Please keep all discussion polite and respectful or the thread will be deleted.

looking forward to your reply.

Craig