Chen, SarahSuri, Manil2023-07-252023-07-252023Chen, Sarah, and Manil Suri. “A Hyperbolic Variant of Tic-Tac-Toe,” Proceedings of Bridges 2023: Mathematics, Art, Music, Architecture, Culture (2023): 497–500. https://archive.bridgesmathart.org/2023/bridges2023-497.html.http://hdl.handle.net/11603/28853Proceedings of Bridges 2023 ConferenceWe consider a variation of tic-tac-toe played on a truncated hyperbolic plane, the inspiration for which arises from using crochet to create hyperbolic geometry. Instead of a 3×3 grid, we now have 13 cells. We show that using some modified rules, each player can again force a draw, as is the case for the usual flat version. We briefly consider tic-tac-toe on a sphere as well, for which we show that the same outcome of a draw holds. Finally, we present a strategy that can be used to choose the best move. Our game variations can be used pedagogically to engender more familiarity with non-Euclidean geometry.4 pagesen-USThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.tic-tac-toe on a truncated hyperbolic planetic-tac-toe on a spherevariations of tic-tac-toeText