"It's almost more a completely different game that happens to use the chess set," says Onsott, trying not to look too visibly pleased that O'Shea wants to carry on talking to him, "and I guess it's not played more often because it's as much a spectator sport as anything else. A lot of chess relies on the fact that it's a perfect-information game, and Kriegspiel isn't. It's more like the war games you can play by computer where you have to find out where the opposing forces are and decide how to deal with them."
He arrests his tendency to run too far with the conversational ball, as he notices that White has moved and announces the fact along with the usual rider "no additional information".