Stephen Curry poured in 31 of his season-high 49 points in the second half Saturday night, including consecutive hoops to break a late tie, rallying the Golden State Warriors to a 109-105 victory over the Boston Celtics in a nationally televised showdown of conference leaders in Oakland, Calif. Golden State avenged a 92-88 loss in Boston in November and prevented the Celtics from becoming the first team in the Steve Kerr coaching era to sweep a season series from the Warriors. The Warriors and Celtics have split their season series each of the past three seasons.