message: Change BOARD_SIZE default to 19
diff: @@ -28,7 +28,7 @@ import os
  import coords
  -N = int(os.environ.get('BOARD_SIZE', 9))
  +N = int(os.environ.get('BOARD_SIZE', 19))
  # Represent a board as a numpy array, with 0 empty, 1 is black, -1 is white.
  # This means that swapping colors is as simple as multiplying array by -1.
  