After dropping a game for the first time this season Friday against Atlanta, the Washington Mystics pulled out an 81-72 win Saturday over visiting conference rival Chicago Sky. The Mystics’ win improves their record to 4-1 and keeps them in first place in the Eastern Conference. Alana Beard racked up 31 points, schooling former Maryland standout and WNBA rookie Kristen Toliver on defense and tying Saturday’s game at 64, with 5:57 left. She then…