SK Gas Cup
The SK Gas Cup (Korean: SK가스배) "features two leagues with 5 players each. The winners of both leagues play a best of three match to decide the winner of the tournament. Time limit is 3 hours each." (source: Gobase)
Previous name was New Stars Best Ten. As the name implies, the tournament is for new professionals. The tournament was discontinued from 2009.
Previous winners (and defeated finalists):
12nd 2008 Kim Kiyoung (d. Park Jung Hwan 2-1) 11st 2007 Yun Junsang (d. Heo Yeongho 2-1) 10th 2006 Baek Hongsuk (d. Lee Yeongkyu 2-0) 9th 2005 Kang Dongyun (d. Ko Geuntae 2-0) 8th 2004 Park Jungsang (d. An Younggil 2-1) 7th 2003 Cho Hanseung (d. Paek Tae-hyeon 2-0) 6th 2002 Yi Se-tol (d. Paek Tae-hyeon 2-0) 5th 2001 Kang Chi-seong (d. Paek Tae-hyeon 2-0) 4th 2000 Yi Sang-hun (d. Yi Se-tol 2-1) 3rd 1999 Mok Chin-seok (d. Weon Seong-chin 2-0) 2nd 1998 Yi Seong-chae (d. Mok Chin-seok 1-0) 1st 1997 An Cho-yeong (d. Kim Yeong-sam 1-0)
It seems the earlier tournaments' final was a one-game match.