Chordal graphs are sometimes called triangulated graphs page 
Donald Knuth - Stanford CS Gates.
YOUTUBE txaGsawljjA Donald Knuth - "Trees and chordal graphs" (Christmas lecture 2012)
From Knuth's musings page
> No talk will be scheduled in 2021, because I'm fully occupied with the US première of Fantasia Apocalyptica page .
> But I'm looking forward to giving another Christmas Lecture in 2022, speaking about “floorplans and twintrees.” With luck, I might even be able to give that lecture without a mask!