Chess is a game for two players, one with the "White" pieces and one with the "Black" pieces. At the beginning of the game, the pieces are set up as pictured at right. (See diagrams below to identify pieces.) These hints will help you to remember the proper board setup:
• Opposing Kings and Queens go directly opposite each other.
• The square in the lower right hand corner is a light one ("light on right").
• The White Queen goes on a light square, the Black Queen on a dark square ("Queen on color").
White always moves first, and then the players take turns moving. Only one piece may be moved at each turn (except for "castling," a special move that is explained later). The Knight is the only piece that can jump over other pieces. All other pieces move only along unblocked lines. You may not move a piece to a square already occupied by one of your own pieces. But you can capture an enemy piece that stands on a square where one of your pieces can move. Simply remove the enemy piece from the board and put your own piece in its place.
• The Queen is the most powerful piece. She can move any number of squares in any direction - horizontal, vertical, or diagonal - if her path is not blocked.
• The Rook is the next most powerful piece. The Rook can move any number of squares vertically or horizontally if its path is not blocked.
• The Bishop can move any number of squares diagonally if its path is not blocked. Note that this Bishop starts on a light square and can reach only other light squares. At the beginning of the game, you have one "dark-square" Bishop and one "light-square" Bishop.
• The Knight's move is special. It hops directly from its old square to its new square. The Knight can jump over other pieces between its old and new squares. Think of the Knight's move as an "L." It moves two squares horizontally or vertically and then makes a right-angle turn for one more square. The Knight always lands on a square opposite in color from its old square.
• The King is the most important piece. When he is trapped, his whole army loses. The King can move one square in any direction - for example, to any of the squares with dots in this diagram. (An exception is castling, which is explained later.) The King may never move into check - that is, onto a square attacked by an opponent's piece.
• The pawn moves straight ahead (never backward), but it captures diagonally. It moves one square at a time, but on its first move it has the option of moving forward one or two squares.
If a pawn advances all the way to the opposite end of the board, it is immediately "promoted" to another piece, usually a Queen. It may not remain a pawn or become a King. Therefore, it is possible for each player to have more than one Queen or more than two Rooks, Bishops, or Knights on the board at the same time.
Each player may "castle" only once during a game and when conditions are met. Castling is a special move that lets a player move two pieces at once - the King and one Rook. In castling, the player moves his King two squares to its left or right toward one of his Rooks. At the same time, the Rook involved goes to the square beside the King and toward the center of the board (see illustrations below). In order to castle, neither the King nor the Rook involved may have moved before. Also, the King may not castle out of check, into check, or through check. Further, there may not be pieces of either color between the King and the Rook involved in castling.
Castling is often a very important move because it allows you to place your King in a safe location and also allows the Rook to become more active.
The main goal of chess is to checkmate your opponent's King. The King is not actually captured and removed from the board like other pieces. But if the King is attacked ("checked") and threatened with capture, it must get out of check immediately. If there is no way to get out of check, the position is a "checkmate," and the side that is checkmated loses.
You may not move into check. For example, moving into a direct line with your opponent's Rook, when if there are no other pieces between the Rook and your King, is not a legal move. Otherwise, the Rook could "capture" the King, which is not allowed.
If you are in check, there are three ways of getting out:
• Capturing the attacking piece.
• Placing one of your own pieces between the attacker and your King (unless the attacker is a Knight).
• Moving the King away from the attack.
If a checked player can do none of these, he is checkmated and loses the game.
If a King is not in check, but that player can make no legal move, the position is called a stalemate and the game is scored as a draw, or tie.