Whether you are a brave commander who aims to wipe out all enemy forces, or a wise tactician who defeats your opponent through tactics and intrigue, the historic game of chess will surely make you sit on the edge of your chair. Your goal is to move your pieces to capture the king of your opponent. When the game starts, you will be given a chessboard with 64 squares, and each player will be assigned a set of pieces. Each set contains 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns, making a total of 16 pieces. The two players will take turns to make their moves. Note that during your turn, you need to finish your moves within the time limit indicated by the timer on the left of the screen, or you will lose.
A pawn can only move forward. During its first move, it can choose to move 1 or 2 squares forward, given that both squares are unoccupied. After that it can move 1 square forward vertically to an empty square, or move 1 square forward diagonally to capture the opponent piece on that square. When an opponent's pawn makes its first move by taking 2 squares forward and it lands on a horizontally or vertically adjacent square with your pawn, you can capture that pawn immediately by moving your pawn 1 square forward diagonally. This move is called "en passant". If your pawn can reach the farthest row on your opponent's side, it will be "promoted" and transformed into a queen, a rook, a bishop or a knight of your choice. A rook can move and capture horizontally or vertically for any distance. A knight can move and capture by moving 2 squares horizontally and then 1 square vertically, or 2 squares vertically and then 1 square horizontally. It can leap over other pieces along its moving path and reach the destination. A bishop can move and capture diagonally for any distance. The queen can move and capture horizontally, vertically or diagonally for any distance. The king can move and capture 1 square in any direction. Once in every game, the king can perform a special move called "castling", which also involves a rook. To make this move, the following conditions must hold: no pieces are left between the rook and the king; both pieces involved in castling have not been moved; the king is not in check; and the squares through which the king passes and the destination are not under attack. If these conditions hold, the king can move 2 squares toward the rook, and the rook can move to the last square which the king has just passed. When you move a piece to attack the opponent's king and it will be captured in your next move, the opponent's king is said to be in check. The opponent must respond by making a move so that the king is no longer under attack. If no legal ways are available for your opponent to remove the king from attack, a checkmate occurs and you win the game. If you make a move and then the opponent cannot make any legal moves, a stalemate occurs and the game will end in a draw. You may also declare a draw game by clicking the corresponding button on the left of the screen, and if your opponent agrees, the game ends. Come and meet chess masters around the world now!