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
Exchange (chess) king. In this ultimate sense, the value of chess pieces remaining in a game does not matter. Although no official score is kept of the value of pieces on the board for each player, much experience in chess play has determined approximate average strategic and tactical value of various pieces relative to a pawn, which is given a value of 1. Bishops and knights have about the same value at 3, rooks are valued at about 5, and a queen is valued at about 9. Since the king is indispensable, it has infinite value. Pieces, especially as distinguished by their