Chess of the position. Weaknesses in the pawn structure, such as isolated, doubled, or backward pawns and , once created, are often permanent. Care must therefore be taken to avoid these weaknesses unless they are compensated by another valuable asset (for example, by the possibility of developing an attack). A chess opening is the group of initial moves of a game (the "opening moves"). Recognized sequences of opening moves are referred to as "openings" and have been given names such as the Ruy Lopez or Sicilian Defense. They are catalogued in reference works such as the "Encyclopaedia of Chess Openings". There
World Chess Championship 2014 an easily drawn endgame. The ninth game was played on 20 November 2014. The opening was the Berlin Defence of the Ruy Lopez. The game was drawn due to threefold repetition on the 20th move. This game included no original moves. The draw meant that Carlsen was closer to converting his 1-point lead to a match win, though Anand seemed satisfied to draw early and focus on his two remaining games with the white pieces. Although a short draw at 20 moves, this game is far from the shortest in match history; a pair of 10-move draws sealed Petrosian's match