The GS Caltex Cup (Korean: GS칼텍스배) is a Go competition.
Outline
The GS Caltex Cup replaced the LG Refined Oil Cup. It is sponsored by the GS Caltex Corporation and Daily Economic News. It currently has the biggest prize in South Korea. The main tournament is a 16 player knockout. The final is a best-of-5. Komi is 6.5 points and the time limit is 10 min main time with 3 x 40s byo-yomi. The winner's purse is 50,000,000 Won (~US$50,000).
References
GS Caltex Cup Wikipedia(Text) CC BY-SA