Whilst web surfing for stuff about Kriegspiel, the Von Reisswitz Prussian Army Wargame, I came across this. Kriegspiel Chess. Basicly, as in the original wargame,but you only know the positions of your own pieces, and an umpire works out the moves, and removes pieces, informs you if you are in check etc. check out this link for a real time game, it’s quite ammusing!
If you are interested in proper Kriegspiel, the Too Fat Lardies have re released Bill Leeson’s translated rules, with the maps etc. I already have a compleat set purchased from a visit to Salute about 10 years ago, but never played it.