Waverly devotes herself to the game and gets involved to the extent that she starts believing that the game is real. This notion of reality helps her win every game.
Waverly's family insist her to practice the game more and more and put no other responsibility on her shoulders.
Effects of Waverly being successful at chess:
Waverly is able to give very little time to her family and she herself gets very less family time.
Waverly has become complacent because of her success.