UNVEILING: What Makes Linguistics Olympiad Puzzles Tricky for LLMs? - Mukund Choudhary; KV Aditya Srivatsa; Gaurja Aeron; Antara Raaghavi Bhattacharya; Dang Khoa Dang Dinh; Ikhlasul Akmal Hanif; Daria Kotova; Ekaterina Kochmar; Monojit Choudhury (CoRR, 2025)