BRATISLAVA (Reuters) - Parliamentary parties agreed to postpone the first round of voting on Slovakia's president to January 29 from January 23, parliamentary spokeswoman Elena Zaťková said on Tuesday. Zaťková said parliament, which will vote for the president directly, wanted to avoid a clash with a summit of central European presidents due to be held in Levoča, eastern Slovakia, on January 23. "Parliamentary chairman Ivan Gašparovič, who is legally entitled to set dates for the assembly's sessions, accepted the argument by the opposition that it would be unethical, as the current president, Michal Kováč, will attend the Levoča summit at the same time," Zaťková told Reuters. She added that parliament had set February 6, as the date for the second round of voting, in the likely event that the first round is inconclusive. Three candidates with little hope of success were nominated for the first round. Government parties did not field a candidate, leaving two opposition figures and one independent to contest the vote. Kováč, whose term expires on March 2, will not stand in the first round but has left open the possibility of joining the race later. With a three-fifths majority required to win the election and no parliamentary grouping strong enough to muster such support, all sides of the political spectrum say deadlock is inevitable.