WU, ToH, Mastermind w/AI submission

Still working on Tetris.  The Mastermind AI has become self aware. It's a monster. We are all in danger. Run for your lives
(from line 40)
if validate_coordinates?(coords) && @board.move_piece(coords) # is the second validation coupled with movement?
  break
else
  puts "Your coordinates are in an improper format."
end

(from line 55)
def validate_coordinates?(coords)
  coords.is_a?(Array) && coords.size == 2
end