Kolkata, Sept. 8 -- There are innings that announce themselves, and then there are innings that alter the conversation around a player. Ishan Kishan's 270-second highest score in a Duleep Trophy final-for East Zone against South Zone at Chepauk on Monday belonged to the latter. On a hot Chennai afternoon, with the pitch neither offering extravagant movement nor easy pace on Day 2 of the five-day match, Kishan did something that has increasingly become unfashionable in the age of instant cricket-he stayed, and then stayed some more. Till he had carved out an innings to remember, with partner Kumar Kushagra helping himself to a hundred as well. "Being an established part of the squad, I feel it is crucial that I take up the primary role of scoring runs and making sure the team's total climbs because of me," Kishan said. By the time he reached 250, Kishan had faced 300 balls, his innings containing 27 fours and seven sixes. It was an extraordinary combination of accumulation and aggression, sort of performance that demanded both patience and a willingness to exploit scoring opportunities. Most importantly, it was a statement of intent. East were 708 all out when stumps was called. The 28-year-old East skipper has never needed reminding that he can hit a cricket ball. His white-ball credentials have long been obvious. The more interesting question has been whether he wants, and is prepared, to do the less glamorous work required in first-class cricket-leaving the ball, absorbing pressure, batting through fatigue and building an innings in layers. At the MA Chidambaram Stadium, he supplied emphatic answers. His first 150 came off 204 balls (19x4, 1x6). It was an innings built largely on control rather than spectacle. With the South attack made to bowl long spells in oppressive conditions, Kishan resisted the temptation to manufacture shots. He defended when the ball demanded it and scored when bowlers strayed. Then came the acceleration. He moved from 150 to 200 in 66 balls, adding boundaries as he began to use his feet against the spinners. Leg spinner Shreyas Gopal, who had already bowled a demanding spell, was repeatedly challenged down the ground. Off-spinner Tripurana Vijay was driven, swept and lofted. The most revealing aspect of the innings was the way he dealt with spin. Rather than allowing the bowlers to dictate the tempo, Kishan repeatedly came down the pitch, got to the pitch of the ball and hit through the line. A six over cow corner, another launched over long-off, and a series of drives through the off side showed that he had worked out where the danger lay, and where the runs were. There was a physical cost. By the second session, Kishan was feeling the effects of the long stay. He stretched his hamstring, occasionally refused singles and, after being struck painfully while attempting a pull, needed attention from the physio. Even then the innings retained its peculiar rhythm-defend, wait, attack. At 250, he raised his bat and absorbed the applause, soon deciding to retire hurt. He returned and a triple hundred was in sight, but Kishan was superbly caught by R Smaran at long on. Kishan missed out on that deserved milestone but for a player whose future has often been discussed through the prism of limited-overs cricket, the significance of this innings lies less in the number itself than in the manner of its construction. Brief scores: East Zone 708 all out (A Easwaran 72, S Mohan 85, I Kishan 270, K Kushagra 101, T Vijay 4/180, C Milind 2/88, S Gopal 2/165) vs South Zone....