Achcha! When I traveled in Jan 2000, it stopped at Chheoki, so I assumed it's a technical halt. Actually, the reason for my assumption is when I traveled in Madras-Patna Exp. (predecessor of Sanghamitra) in 1989, the train halted at Chheoki with an announcement that Allahabad passengers should get down here. Isliye mujhe laga, Chheoki mein compulsory halt hai. Thanks for clearing that up :-)