The US Open is a tournament played at the annual US Go Congress. Being an "Open" tournament, it is open to both amateurs and professional players alike. The tournament is a six-round, Swiss-McMahon Tournament, one round per day (Sunday, Monday, Tuesday, Thursday, Friday, and Saturday). The player with the highest score will be declared the new US Open Champion. AGA rules apply, 7.5 komi. Players up to 3 Dan in strength receive 90 minutes of initial playing time, with 5 30-sec overtime periods. 4 Dans and stronger receive 120 min initial time, and 5 30-sec overtime periods.
The US Open is the largest tournament in the United States, typically drawing over 300 competitors.
2012: Zi Yang Hu 2011: Yongfei Ge 2010: Kim Myungwan 2009: Kim Myungwan 2008: Kim Myungwan 2007: Yongfei Ge 2006: Andy Liu 2005: Lin Xuefen 2004: Jie Li 2003: Jie Li 2002: Jie Li 2001: Yongfei Ge 2000: Ted Ning? 1999: Danning Jiang? 1998: Jie Li 1997: Thomas Hsiang 1996: Danning Jiang? 1995: Danning Jiang? 1994: Keun-Young Lee? 1993: John Lee 1992: Woo Jin Kim? 1991: Si Yeon Li? 1990: Jung Ho Lim?
Further records available at http://www.usgo.org/us-championship