“The demonetisation puzzle” read with Subhomoy Bhattacharjee’s “The backroom story: How it all played out” (November 7) demystifies the note ban last year. For those who have been following the happenings since November 8, 2016 and were not able to solve the “puzzle” yet, can find enough clues to move towards reasonably acceptable answers for questions like why note ban was considered as an option to fight black money, why things went wrong midway, if they really did, and what was the role of the Reserve Bank of India (RBI) in providing backward and forward linkages in implementing the project