If Rajasthan Royals win the match, they will end up with 15 points. Chennai Super Kings, in this situation will have to beat Kings XI Punjab to end the marathon with 17 points, sealing the 2nd place for themselves on the table.
The second situation would be… even if Chennai Super Kings lose the match to Kings XI Punjab, they will have to keep their net run rate better than Rajasthan Royals, as a result matching Rajasthan Royals at 15 points. Chennai Super Kings will have an advantage here as they would know in advance what they need to do to keep their net run rate better than Rajasthan Royals.
Now even in this situation, they will have to assume that the match between Deccan Chargers and Royal Challengers Bangalore is not canceled due to rain. In an unlikely event that “Deccan Chargers Vs. Royal Challengers Bangalore” match is declared as a “No result”, there will be a 4 way tie between DC, RCB, CSK and RR with each having 15 points.
Bottom-line: Beat Kings XI Punjab and celebrate!