Osborn, J., B. Samuel, M. Mateas, and N. Wardrip-Fruin. “Playspecs: Regular Expressions for Game Play Traces”. Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment, vol. 11, no. 1, June 2021, pp. 170-6, doi:10.1609/aiide.v11i1.12803.