The one-round Voronoi game

  • Authors:
  • Otfried Cheong;Sariel Har-Peled;Nathan Linial;Jiří Matoušek

  • Affiliations:
  • Utrecht University, The Netherlands;University of Illinois, Urbana, IL;Hebrew University, Jerusalem, Israel;Charles University, Czech Republic

  • Venue:
  • Proceedings of the eighteenth annual symposium on Computational geometry
  • Year:
  • 2002

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Abstract

(MATH) In the one-round Voronoi game, the first player chooses an n-point set $\PFRST$ in a square $Q$, and then the second player places another n-point set $\PSCND$ into $Q$. The payoff for the second player is the fraction of the area of $Q$ occupied by the regions of the points of $\PSCND$ in the Voronoi diagram of $\PFRST\cup\PSCND$. We give a strategy for the second player that always guarantees him a payoff of at least $\frac12+\alpha$, for a constant $\alpha0$ independent of n. This contrasts with the one-dimensional situation, with $Q=[0,1]$, where the first player can always win more than 1/2.