Hans Olav Lahlum is a Norwegian chess organizer and international chess official based in Gjøvik, Norway. He is best known as an experienced tournament organizer for high-level over-the-board events. Moreover, his work is strongly associated with consistent tournament administration and clear event operations.

In addition, he serves as the chief organizer of Fagernes Chess International in Fagernes, Norway. The festival typically includes a top GM section, an open chess tournament group, and side events such as blitz chess. Furthermore, the main competition is a FIDE-rated tournament focused on classical chess with professional pairing and arbiter support.

Furthermore, Lahlum emphasizes clear regulations, punctual round starts, and good playing-hall conditions. As a result, participants can expect reliable communication and practical logistics throughout the event week.