Shane Watson smashed an unbeaten century and then bagged two wickets as Rajasthan Royals outplayed defending champions Kolkata Knight Riders by nine runs to seal a play-offs berth in the IPL cricket tournament.Lifting themselves from the sixth spot, the inaugural champions leap-frogged to the second place, while KKR, with 7 wins and 6 losses, only have a mathematical possibility of making the final-four.Man-of the-match Watson it was, who made things possible for RR as he muscled his way to a brilliant 104 not out in 59 balls, consisting of 5 sixes and 9 fours, to help the side amass 199 for six at the Brabourne Stadium.Rajasthan Royals batsman Shane Watson celebrates his century during the IPL match against Kolkata Knight Riders in Mumbai.Man-of the-match Watson it was, who made things possible for RR as he muscled his way to a brilliant 104 not out in 59 balls, consisting of 5 sixes and 9 fours, to help the side amass 199 for six at the Brabourne Stadium.