#square.artifact  any artifact having a shape similar to a plane geometric figure with four equal sides and four right angles; "a checkerboard has 64 squares"
  supertype:  #artifact__artefact  a man-made object taken as a whole
  part of:  #checkerboard  a board having 64 squares of two alternating colors
     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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