国际象棋 a game for two people played on a board marked with black and white squares on which each playing piece (representing a king, queen, castle, etc.) is moved according to special rules. The aim is to put the other player's king in a position from which it cannot escape (= to checkmate it).
N-UNCOUNT 国际象棋 Chess is a game for two people, played on a chessboard. Each player has 16 pieces, including a king. Your aim is to move your pieces so that your opponent's king cannot escape being taken.