New Delhi, Feb. 25 -- This puzzle game will test your detective skills. Check out this fictional situation.

In the heart of Kolkata, the prestigious Grand Library housed a priceless first-edition manuscript of Rabindranath Tagore. One morning, the librarian discovered the manuscript missing from its glass case. There were no signs of forced entry, and only four people had access to the restricted section that night:

Professor Sen: A historian researching rare books from 9 PM to midnight.

Aditi: The night security guard who patrolled the library from 10 PM to 4 AM.

Ramesh: A janitor who finished his cleaning shift at 11 PM.

Vikram: A literature student who was given special permission to study late. He left at 2 AM.

Here are some clu...