Dan Hefetz obtained his PhD in computer science at Tel Aviv University and is lecturer in pure mathematics at the University of Birmingham. Michael Krivelevich obtained his PhD in mathematics at Tel Aviv University, Israel, where he is now a full professor. Miloลก Stojakoviฤ obtained his PhD in computer science at ETH Zรผrich, Switzerland, and is now an associate professor at the University of Novi Sad, Serbia. Tibor Szabรณ, who received his PhD from the Ohio State University, is a professor in the mathematics department at Freie Universitรคt Berlin, Germany. One of their common research interests is positional games. In May 2013 they jointly organized a workshop on this topic at the Mathematisches Forschungsinstitut Oberwolfach (MFO).