Larry Smith wrote on Thu, Nov 20, 2008 07:20 PM UTC:
The ZigZag Bishop and Zigzag Rook both fulfil the definition of zigzag.
'1. a line, course, or progression characterized by sharp turns first to one side and then to the other.'
The ZigZag Bishop can begin with a diagonal move then change to an orthogonal move. Or start with an orthogonal then change to a diagonal.
The ZigZag Rook can begin with an orthogonal move then change to a diagonal move. Or start with a diagonal then change to an orthogonal.
Even if they only perform two direction shifts, this follows the concept of zig and zag. The word zigzag comes from the French which is often used to describe 'forked' events such as lightning. Which is actually a splitting of the path. Which both of these pieces do.
So this argument about semantics is pointless.
But I can see how someone who has previously proposed a zigzag piece might feel a bit put upon. But are these piece exact replicas? I do not believe so. Just think of them as a homage and continuation of the concept.