#checkerboard  a board having 64 squares of two alternating colors
  supertype:  #gameboard__board  a flat portable surface (usually rectangular) designed for board games; "he got out the board and set up the pieces"
  subtype:  #chessboard  a checkerboard used to play chess
  part:  #square.artifact  #diagonal.line
  part of:  #checkers__draughts  a checkerboard game for two players who each have 12 pieces; the object is to jump over and so capture the opponent's pieces
  part of:  #chess_game__chessgame__chess__ches  a game for two players who move their 16 pieces according to specific rules; the object is to checkmate the opponent's king

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