Hello student,
It is practically difficult to tell you exactly wheter you will get selected for IIIT Lucknow or not. However following the previous year trends, the special round opening and closing rank for OBC category was 18k to 26k. Considering the cut off rank for just the First special counseling round, I would insist that you have a fairly high chance of getting selected for CSE branch.
Just to verify it yourself, you can use the Careers360 college predictor tool so that you have a clear understanding of where you are currently in this phase of counseling which is about to start.
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
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