Niina Koskela is participant in numerous Finnish Women's Chess Championships, where winning three gold medals (1990, 2002, 2008) and three silver medals (1989, 1992, 1994). In 1991, in Subotica Niina Koskela participated in Women's World Chess Championship Interzonal Tournament and ranked in 34th place. In 2000, Niina Koskela participated in Women's World Chess Championship by knock-out system and in the first round won to Subbaraman Vijayalakshmi but in the second round lost to Nana Ioseliani.