Will leave here with a link to last year’s blog.
Amritapuri selection criteria https://icpc.amrita.ac.in/2019/onsite-contest/
Kanpur selection criteria http://kanpur.indiaicpc.in/PrelimRules.pdf
Kharagpur’s selection criteria http://acm.iitkgp.ac.in/ under Contest rules.
This year’s rank list https://www.codechef.com/public/rankings/ICPCIN19
Any comment related to unfairness of current rank list here will result in comment getting flagged as spam. There are separates posts regarding them.