Opening of the Senior and Sub-junior National Power Twenty Cricket Championships got off to a colourful start amidst fireworks and cultural display at Kalinga Stadium in Bhubaneswar today. According to host Orissa Power Twenty Cricket Association secretary Mohammad Azam, power twenty cricket will be played on the lines of twenty20 cricket. ``The only difference is that in power twenty cricket the fielding side shall have to keep nine fielders inside and two outside the 30-yard circle all the time,`` he explained.