{Creating mathematical jigsaw puzzles using \TeX\ and~friends} {Julian Gilbey} {Hermitech Laboratory has created Formulator Tarsia, which is free Windows-based \WYSIWYG\ software for authoring mathematical jigsaws. These are puzzles made out of triangles and squares with questions and answers written along the edges of the shapes; the aim is to match them up correctly. This talk describes a similar \TeX- and Python-based system which I have created, which should be able to run on most operating systems. It makes use of a text-based \YAML\ input file, and also allows for output to a Markdown file for further processing.}