Disclaimer: Minus-2 is the best formula. However here is the wining strategy for Khaleda.
Current status: Khaleda has majority support but she is losing because of wrong strategy.
Predicate: Public movement will oblige the government for neutral election.
Public movement :
Precondition: Public movement will be materialized if and only if Khaleda stops atrocity, abandon all kinds strikes. And demonstrate only peaceful movement.
General public will not join the demonstration if police fire. Khaleda should come out declare peaceful movement and instructs his party men the same.
What kind of demonstration: The demonstration will be enjoyable, with drama and lot of fun stuff, staging drama like 'hirok rajar deshe' , etc. As, the public support intensified tremendously, the international community, the army and the public will oblige Hasina to listen.