Kolkata FF is one kind of number game people in Kolkata checking every day. Many people talk about it like small time pass, but it also risky because money can go fast. Result come many times in one day, so people keep looking on mobile again and again. Some folks say they guess number by experience, but mostly it feel like full luck only. I see many friends get happy one day and sad next day. Better to play careful or just watch result for fun, not take too much stress. Life already hard, no need extra tension.