|Full name||Lee Ha-jin|
|Born||June 21, 1988|
Lee Ha-jin (Korean: 이하진; born 21 June 1988; known as Haylee on YouTube) is a retired professional Go player from South Korea. From July 2014 to 2016, she served as Secretary General of the International Go Federation.
Lee was born and grew up in Daejeon, South Korea. She is the elder daughter of an engineer father and an accountant mother, both of whom are avid Go players. Lee naturally picked up an interest in Go at a young age, and her parents began teaching her the game when she was 5 years old. As her talents won increasing recognition, her parents sent Lee to a professional Go school in Seoul, to live at the master’s house with him, his family, and several fellow students. Lee was 9 years old, and from that time on would take a break from her Go studies only for a few days each year to visit her family.
Lee debuted as a professional player in 2004, at the age of 16, passing the intense competition that selected one new female pro annually. As a professional player, she was often listed among the top female players in Korea. She won 1st place in the women’s division of the 5th ETLand Cup Professional Baduk Championship in 2008, and won a bronze medal at the 2008 World Mind Sports Games in the same year. She qualified 4 times for the Korean national team (2006, 2007, 2008, 2010), which selects 5 female professional players each year for the Jeongganjang Cup international women’s team championship.
She wrote a book about her experience as a professional player, Outside the Board: Diary of a Professional Go Player.
Lee is running a YouTube channel, Haylee's World of Go/Baduk, demonstrating high-level Go in English. In her YouTube video #142, titled "Mountain View", she announced that she has moved to the United States, living in Mountain View, California.
- "Lee Hajin Storm". GoBase.org. Retrieved 14 February 2016. CS1 maint: discouraged parameter (link)
- "Structure of the IGF". International Go Federation. Archived from the original on 2014-09-10.
- "SportAccord unveils World Mind Games 2014 Ambassadors". SportAccord.org. Archived from the original on 11 March 2016. Retrieved 14 February 2016. CS1 maint: discouraged parameter (link)
- Lee, Hajin (2016), Outside the Board: Diary of a Professional Go Player, Old Hickory Press, ISBN 978-1945025006
- Fede, Samantha (2016-08-05). "Hajin Lee's Next Big Move". American Go E-Journal.
- "35th General Meeting of the International Go Federation". RANKA online. 2016-06-04.
- "Mountain View - Haylee's Live Go 142". 59 minutes in.