Mulayam's announcement at the press conference was abrupt as he had held deliberations with leaders of Janata Parivar parties with his younger brother and his party's UP unit chief Shivpal Yadav, a strong votary of the alliance, in tow.
In a show of solidarity, Janata Parivar leaders including JD(S) chief and former Prime Minister H D Deve Gowda had come together for the SP's silver jubilee celebrations here on November 5 after Shivpal gave a call for unity among erstwhile Janata Parivar leaders.
Party insiders said that Mulayam decided to go solo as there was no unanimity on the number of seats to be shared.
The chief minister had clearly said that before an alliance was struck, it was necessary to weigh who stood to gain and who were to lose.
Reports had said that Congress wanted some 100-125 seats, but Akhilesh was not too enthusiastic and was prepared to give just those seats held by that party. Congress has 29 MlAs in the present House.
It was not clear as to how many seats Ajit Singh was jockeying for. His RlD has influence in western UP.
As far as JD(U) is concerned, it has little traction in the state, but is making concerted efforts under its president and Bihar Chief Minister Nitish Kumar to carve a niche for itself.
The Samajwadi Party, which was initially part of Bihar's grand alliance, had walked out of it after it was offered only a handful of seats to contest the Assembly election there.
The grand alliance of JD(U), RJD and Congress had, however, scripted a glorious electoral victory, defeating the BJP-led NDA.