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
Lasker's Manual of Chess the relative values of the pieces. Lasker quickly moves on to the fundamentals of chess strategy and tactics, and ends the section with examples of some of the basic mates. He also explains how to read descriptive chess notation, which is used throughout the book. "The Theory of the Openings" begins with an explanation of the general principles of opening play and how openings affect the course of the middlegame and endgame. The rest of the section attempts to cover many of the major openings, providing example games and analyses of each. This section ends by detailing the increasing value