By Chris Livemore I can't lie. This one was entirely my fault and I’m not even able to partially shift the blame. Nobody asked me to explain what a shield wall was. Nobody knew what a shield wall was. Nobody cared what a shield was. Nobody except me. My two eldest children were perfectly happy hitting each other with sofa cushions — randomly, enthusiastically, and without any tactical structure whatsoever. I introduced the tactical structure. And then they joined forces. It