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Nicholas</a>; <a href="/authors/falgas-ravry.victor" title="Author Profile">Falgas-Ravry, Victor</a></div> <h2 class="title"> <strong>Maker-breaker percolation games. I: Crossing grids.</strong> <i>(English)</i> <a class="label nowrap" href="/1466.05133">Zbl 1466.05133</a> </h2> <div class="source"> <a href="/serials/1952" title="Journal Profile">Comb. Probab. Comput.</a> <a href="/?q=in%3A465090" title="Articles in this Issue">30, No. 2, 200-227 (2020)</a>. </div> <div class="abstract">Summary: Motivated by problems in percolation theory, we study the following two-player positional game. Let \(\Lambda_{m\times n}\) be a rectangular grid-graph with \(m\) vertices in each row and \(n\) vertices in each column. Two players, Maker and Breaker, play in alternating turns. On each of her turns, Maker claims \(p\) (as yet unclaimed) edges of the board \(\Lambda_{m\times n}\), while on each of his turns Breaker claims \(q\) (as yet unclaimed) edges of the board and destroys them. Maker wins the game if she manages to claim all the edges of a crossing path joining the left-hand side of the board to its right-hand side, otherwise Breaker wins. We call this game the \((p, q)\)-crossing game on \(\Lambda_{m\times n}\).<br class="zbmathjax-paragraph">Given \(m, n\in\mathbb{N}\), for which pairs \((p, q)\) does Maker have a winning strategy for the \((p, q)\)-crossing game on \(\Lambda_{m \times n}\)? The (1, 1)-case corresponds exactly to the popular game of Bridg-it, which is well understood due to it being a special case of the older Shannon switching game. In this paper we study the general \((p, q)\)-case. Our main result is to establish the following transition.<br class="zbmathjax-paragraph"><br class="zbmathjax-paragraph">If \(p\geq 2q\), then Maker wins the game on arbitrarily long versions of the narrowest board possible, that is, Maker has a winning strategy for the \((2q, q)\)-crossing game on \(\Lambda_{m\times (q+1)}\) for any \(m\in\mathbb{N}\). <br class="zbmathjax-paragraph">If \(p\leq 2q-1\), then for every width \(n\) of the board, Breaker has a winning strategy for the \((p, q)\)-crossing game on \(\Lambda_{m\times n}\) for all sufficiently large board-lengths \(m\).<br class="zbmathjax-paragraph">Our winning strategies in both cases adapt more generally to other grids and crossing games. In addition we pose many new questions and problems.</div> <div class="clear"></div> <br> <div class="citations"><div class="clear"><a href="/?q=rf%3A7359332">Cited in <strong>3</strong> Documents</a></div></div> <div class="classification"> <h3>MSC:</h3> <table><tr> <td> <a class="mono" href="/classification/?q=cc%3A05C57" title="MSC2020">05C57</a> </td> <td class="space"> Games on graphs (graph-theoretic aspects) </td> </tr><tr> <td> <a class="mono" href="/classification/?q=cc%3A05D99" title="MSC2020">05D99</a> </td> <td class="space"> Extremal combinatorics </td> </tr><tr> <td> <a class="mono" href="/classification/?q=cc%3A91A43" title="MSC2020">91A43</a> </td> <td class="space"> Games involving graphs </td> </tr><tr> <td> <a class="mono" href="/classification/?q=cc%3A91A24" title="MSC2020">91A24</a> </td> <td class="space"> Positional games (pursuit and evasion, etc.) </td> </tr><tr> <td> <a class="mono" href="/classification/?q=cc%3A91A05" title="MSC2020">91A05</a> </td> <td class="space"> 2-person games </td> </tr></table> </div><div class="keywords"> <h3>Keywords:</h3><a href="/?q=ut%3Apercolation+theory">percolation theory</a>; <a href="/?q=ut%3Atwo-player+positional+game">two-player positional game</a></div> <!-- Modal used to show zbmath metadata in different output formats--> <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;"> <!-- alert for connection errors etc --> </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function"> <!-- Button trigger metadata modal --> <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1466.05133" data-ciurl="/ci/07359332" data-biburl="/bibtex/07359332.bib" data-amsurl="/amsrefs/07359332.bib" data-xmlurl="/xml/07359332.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07359332.pdf" title="Zbl 1466.05133 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1017/S0963548320000097" aria-label="DOI for “Maker-breaker percolation games. I: Crossing grids”" title="10.1017/S0963548320000097">DOI</a> <a class="btn btn-default btn-xs" type="button" href="https://arxiv.org/abs/1810.05190"title="Note: arXiv document may differ from published version">arXiv</a> </div> <div class="sfx" style="float: right;"> <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank" title="Open Access License" class="cc-license-link no-new-tab-icon"> <img src="https://static.zbmath.org/contrib/img/cc/svg/icons/cc.svg" alt="Creative Commons CC license icon" class="cc-license-icon"> <img src="https://static.zbmath.org/contrib/img/cc/svg/icons/by.svg" alt="Creative Commons BY license icon" class="cc-license-icon"> </a> </div> </div> <div class="references"> <h3>References:</h3> <table><tr> <td>[1]</td> <td class="space">Beck, J. (1982) Remarks on positional games I. Acta Math. Hungar.4065-71. · <a href="/0515.90100" class="nowrap">Zbl 0515.90100</a></td> </tr><tr> <td>[2]</td> <td class="space">Beck, J. (1985) Random graphs and positional games on the complete graph. In Random Graphs ’83, Vol. 118 of North-Holland Mathematics Studies, pp. 7-13, Elsevier. · <a href="/0602.05046" class="nowrap">Zbl 0602.05046</a></td> </tr><tr> <td>[3]</td> <td class="space">Beck, J. (1993) Achievement games and the probabilistic method. In Combinatorics: Paul Erdös is Eighty, Vol. 1, pp. 51-78, János Bolyai Mathematical Society. · <a href="/0806.90146" class="nowrap">Zbl 0806.90146</a></td> </tr><tr> <td>[4]</td> <td class="space">Beck, J. (1994) Deterministic graph games and a probabilistic intuition. Combin. Probab. Comput.313-26. · <a href="/0819.90147" class="nowrap">Zbl 0819.90147</a></td> </tr><tr> <td>[5]</td> <td class="space">Beck, J. 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Algorithms26204-223. · <a href="/1117.91014" class="nowrap">Zbl 1117.91014</a></td> </tr></table> <div class="reference_disclaimer"> This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. In some cases that data have been complemented/enhanced by data from zbMATH Open. 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