In contrast to the inertia in the SP camp, the ruling Bharatiya Janata Party showed no complacency in the run-up to the polls this month.
Only one of the top five richest candidates managed to win this time.
The Samajwadi Party on Thursday announced Dimple Yadav as its candidate for Mainpuri parliamentary seat, which fell vacant after the death of party founder Mulayam Singh Yadav.
Counting began at 8 am under multi-tier security cover. At first, postal ballots will be counted and then EVMs opened.
Counting of votes for the bypolls in Delhi, Uttar Pradesh, Punjab, Tripura, Andhra Pradesh and Jharkhand will be taken up on Sunday.
Adityanath on the occasion praised the Centre's 'Agnipath' scheme and highlighted its benefits.
Nirahua, a Bhojpuri star and the BJP's candidate, is drawing huge crowds in his road shows and meetings after he entered the poll fray against Yadav, but voters with caste and local equations appear favourable for the senior Yadav.
On the eve of the sixth and penultimate phase of the marathon Uttar Pradesh elections, Rediff.com's Aslam Hunani reports on what's at stake.