In a rain-marred IPL match in Bangalore today, Royal Challengers Bangalore beat Kolkata Knight Riders by four wickets under Duckworth-Lewis method. The match was reduced to 13 overs per side after evening showers halted proceedings for nearly two hours. Batting first, the Kolkata team made 89 for four in their 13 overs. The winners overhauled the revised target of 102 by making 105 for six in 12.3 overs.