Opener's 2nd ton of the season, leggie's hat-trick help Rajasthan prevail in high-scoring thriller; KKR lose by seven runsA sensational hat-trick from Rajasthan Royals leg-spinner Yuzvendra Chahal in his fourth over and the 17th of the innings when Kolkata Knight Riders needed 39 runs to win off 24 balls to chase down 217 enabled the inaugural IPL champs to a thrilling seven-run win at the Brabourne Stadium on Monday. Chasing 218, the Knights seemed well placed to do the seemingly unthinkable thanks to a blazing half-century from Aaron Finch and a well-paced 85 from skipper Shreyas Iyer. AS IT HAPPENED | SCORECARD | POINTS TABLEThey were 178 for 4, but then Chahal got into the act getting the wickets of Venkatesh Iyer, Shreyas, Shivam Mavi and Pat Cummins, the last three off successive balls to star in a stunning turnaround. Umesh Yadav belted Trent Boult for 20 runs in his last over and the 18th of the innings to make it 18 needed off the last two. Prasidh Krishna bowled a decent 19th over leaving the Knights with 11 runs of the last over bowled by debutant Obed McCoy. The West Indian held his nerve and dismissed Sheldon Jackson and Umesh Yadav to bowl the Royals to a famous win on a belter of a track.