English

Connector-Breaker games on random boards

Combinatorics 2022-08-22 v1

Abstract

By now, the Maker-Breaker connectivity game on a complete graph KnK_n or on a random graph GGn,pG\sim G_{n,p} is well studied. Recently, London and Pluh\'ar suggested a variant in which Maker always needs to choose her edges in such a way that her graph stays connected. By their results it follows that for this connected version of the game, the threshold bias on KnK_n and the threshold probability on GGn,pG\sim G_{n,p} for winning the game drastically differ from the corresponding values for the usual Maker-Breaker version, assuming Maker's bias to be 11. However, they observed that the threshold biases of both versions played on KnK_n are still of the same order if instead Maker is allowed to claim two edges in every round. Naturally, this made London and Pluh\'ar ask whether a similar phenomenon can be observed when a (2:2)(2:2) game is played on Gn,pG_{n,p}. We prove that this is not the case, and determine the threshold probability for winning this game to be of size n2/3+o(1)n^{-2/3+o(1)}.

Keywords

Cite

@article{arxiv.1911.01724,
  title  = {Connector-Breaker games on random boards},
  author = {Dennis Clemens and Laurin Kirsch and Yannick Mogge},
  journal= {arXiv preprint arXiv:1911.01724},
  year   = {2022}
}

Comments

33 pages, 3 figures

R2 v1 2026-06-23T12:05:17.513Z