New Delhi: The battle for Bengal will come to an end as 52 constituencies vote in the last two phases of Assembly polls. This could perhaps be the last chance for the Left to defend their bastion. Traditionally considered one of the strongest bastions of the Left in West Bengal, 52 assembly seats spread across four districts of Bankura, Purulia, West Midnapore and parts of Burdwan will go to polls in the last two phases in this decisive battle. These seats had largely remained untouched by the Mamata wave during the 2009 Lok Sabha elections and the Left front hopes that it continues to be so.“With these 54 seats in our kitty we hope to have an impressive tally,’ said Mohammad Salim, CPI(M) Leader.But it will not be an easy ride this time - from the Maoist heartland of West Midnapore and Purulia to the coal belt of Burdwan where illegal mining is rampant, to the countless stories of neglect and deprivation from Bankura, the Left front's woes are plenty - something that the Trinamool Congress wants to capitalize on.“On May 13, the rule of psephology will change forever. People will see a change that no one has ever seen before. They know across the state even in these 52 ACs that Mamata Banerjee is the only option,” said Derek O Brien.In the end it’s all game of numbers where even one seat can be a decisive one. The left front will do whatever it takes to maintain its dominance in the remaining 52 seats that will go to polls in the last two phases to try and square off the Mamata spell.