The critical bias for the Hamiltonicity game is (1+o(1))n/ln n
arXiv:0909.2744
Abstract
We prove that in the biased 1:b Hamiltonicity Maker-Breaker game, played on the edges of the complete graph K_n, Maker has a winning strategy for b(n)<=(1-o(1))n/ln n, for all large enough n.
9 pages