ok i will tell you ...i can book tatkal tickets in any train possible no matter how tough a train is ..how ??..their are a lot of small isolated stations where there is no rush ..for ex OGM ..i have gone their leisurely and booked ticket in KSK , APSK , SBC Raj , udyan , ypr - hwh exp ..you name the train ...there is hardly a person at the counter and you get any tatkal for any train ...