a mathematical conjecture about tiling space by cubes
... that a mathematical conjecture about tiling space by cubes was transformed into a problem in graph theory that became a benchmark for clique-finding algorithms?
... that <b id="mwAfw"><a href="./Keller's_conjecture" id="mwAf0" rel="mw:WikiLink" title="Keller's conjecture">a mathematical conjecture about tiling space by cubes</a></b> was transformed into a problem in <a href="./Graph_theory" id="mwAf4" rel="mw:WikiLink" title="Graph theory">graph theory</a> that became a benchmark for <a href="./Clique_problem" id="mwAf8" rel="mw:WikiLink" title="Clique problem">clique-finding algorithms</a>?