I have a suggestion for this website to improve predicting PNR confirmation. I have learnt it the hard way that some trains have a large number of Quota berths and only a few are available under General Quota. Example Yesvantpur Howrah Duronto Express (12246). Its 2AC has only 20 berths available in general quota and 10 in Tatkal quota. Rest 22 berths in 2AC are blocked under various quotas and are released just 4hrs before departure if unused by the relevant quota authority. This means we either cancel our tickets thinking tickets will not confirm or get hold of brokers to get our bookings under some quota. My relatives' tickets remained WL/3 and WL/4 till the end and I got them confirmed through a broker, paying a decent premium. We later realised that 3 seats remained vacant in the bogie under Doctor quota and TTE quota and two 3AC passengers were...
more... given free upgrade to 2AC. This is very poor on anxious people on wait lists. This could have been avoided if data is made available about the non-General quota (22 berths in case of this train in 2AC). However, I'm not sure if usage status of quota can easily be available, as this is confidential data with the railways. Nevertheless, even if the total number of berths/seats blocked under various quotas is known, we can better predict chances of confirmation.