Kriegspiel (chess) illegal, the player tries again; if it is legal, that move stands. Each player is given information about checks and captures. They may also ask the referee if there are any legal captures with a pawn. Since the position of the opponent's pieces is unknown, Kriegspiel is not a game with perfect information. As each player cannot see his opponent's pieces, the game is sometimes referred to as "blind chess". There are several different rule sets for Kriegspiel. The most widespread rules are those used on the Internet Chess Club, where Kriegspiel is called "Wild 16". The rules are as
White and Black in chess with an extra tempo. As late as the mid-to-late 19th century, the practice of White moving first had not yet become standard. George Walker in his popular treatise "The Art of Chess-Play: A New Treatise on the Game of Chess" (4th edition 1846), set forth the rules of London's St. George's Chess Club promulgated in June, 1841. "Law III" provided that the player who moved first had the choice of color; if the players played more games at the same sitting, the first move would alternate, but each player would continue to use the same colored pieces as he had