Eligibility: Everyone
The main event! A six-round, Swiss-McMahon style tournament held on Sunday, Monday, Tuesday, Thursday, Friday, and Saturday mornings. All rounds begin at 9:00 a.m. The winner with the highest McMahon score will be crowned the new US Open Champion.
Registration: Attendees planning to play in the US Open MUST confirm their participation upon check-in to the US Go Congress. All players who have an AGA rating are required to enter at a rank consistent with their latest AGA rating; exceptions to this rule will be allowed only with the explicit approval of the tournament directors (TDs). Players who do not have AGA ratings must enter at a rank approved by the TD.
Handicaps: Games will be even in most sections, with a compensation to white (komi) of 7.5 points. In the lower kyu sections the TD will assign handicaps based on band differences. In handicap games, komi for white is 0.5 points.
Rules: AGA rules will be used. Komi for white is 7.5 points.
Adjournments: Players must finish their games before the lunch break. Sealed moves are no longer allowed during tournament play. (This is a change from the past.)
Recording Devices: Electronic devices are allowed for recording games, but must remain visible to opponents at all times. They must also be left at the playing table when taking bathroom breaks. Use of AI aids is strictly forbidden and will be considered grounds for removal from the tournament. If there’s any question about a recording device, players may request the TD to inspect and approve the device.