After the failure of the first three rounds of Presidential voting in December 2014, the next three rounds of voting that lay ahead require:
First round: 180 votes
Second round: simple majority, i.e. 151 votes
Third round: relative majority based on the number of present MPs
There is an interval of five days between the voting rounds.
Practically, SYRIZA-IndepGreeks coalition can elect their candidate on the second round.