%0 Journal Article %T Three problems for the clairvoyant demon %A Geoffrey Grimmett %J Mathematics %D 2009 %I arXiv %X A number of tricky problems in probability are discussed, having in common one or more infinite sequences of coin tosses, and a representation as a problem in dependent percolation. Three of these problems are of `Winkler' type, that is, they ask about what can be achieved by a clairvoyant demon. %U http://arxiv.org/abs/0903.4749v2