Tuesday Night Marathon - 2021 June - In-Person

Mechanics' Institute

Event Overview

Tuesday, June 1, 2021 to Tuesday, June 29, 2021

First In-Person event back at Mechanics' after the pandemic


Tuesday Night Marathon - June 2021


Dates -- Tournament format -- Byes -- Prize Fund

Registration -- Eligibility -- Tournament rules -- FAQ


1. Dates & Location

  • FIVE Tuesdays in June 2021: June 1, 8, 15, 22, 29
  • Location: Mechanics' Institute - Chess Room 4th Floor
    57 Post Street, San Francisco, CA 94104 (click here to map)


2. Tournament format:

  • Tournament format: individual Swiss
  • Total Round: 5 rounds  ---   1 round each night
  • Round times: each Tuesday 6:30PM Pacific Time (GMT+8)
  • Time control: G/120;d5  (Game in 120 minutes with 5 second delay with each move. -- Please note that we are back to delay!)
  • Games will be US Chess regular rated - tournament will be submitted immediately after last round finished.
  • Sections: TWO sections: 1800+ and under1800
  • Pairings are based on the June 2021 OTB or ONL supplemental regular US Chess rating. The higher rating will be used for pairing purposes.
  • Playup: Players must have a 1600 USCF OTB or ONL supplemental rating in order to be eligible to play up to the 1800+ section.

3. Byes

  • Byes are available for players in any rounds in case they can't participate but would like to stay in the tournament.
  • Max 2 half-point byes can be requested in this tournament.
  • Round 1-3 byes must be requested 60 minutes prior to the round start time.
  • Round 4-5 byes must be requested before start of Round 1. Round 5 bye is irrevocable to prevent prize fund manipulations.
  • Late registrations will receive a 0.5 bye for any missed round, up to total 2 rounds.

4. Prize Fund --  $1200 based on 40 paid entries

  1800+ u1800
1st Place $250 $200
2nd Place $175 $150
3rd Place $100 $75
Best under2000 $75  
Best under1800 $75  
Best under1600   $50
Best under1400   $50
  • Please allow 2-3 weeks for processing prize checks.
  • Per IRS rules anyone with a cumulative $600+ prizes in any calendar year will need to fill out a W9 and Mechanics' Institute will be providing a 1099 form. 

5. Registration

  • MI library member: $60
  • Non-MI library member: $90
  • Play-up: $15 for members, $20 for non-members.
  • $5 admin fee for all cancellations & refunds.
  • Click HERE to Register: coming soon!

6. Eligibility

  • Players must have current US Chess Federation membership. Expiration date of their US Chess membership must be later than the last day of the tournament.
  • Not sure if you have a membership? Need to check the expiration date of your members? Visit: https://new.uschess.org/player-search
  • Become a member or renew your membership: https://new.uschess.org/player-search

7. Tournament rules

  • Standard US Chess rules apply.
  • Forfeit time is 60 minutes: if player is present at the board by 7:30pm, the opponent will be awarded a forfeit win.



57 Post Street
San Francisco, CA 94104
United States

Grand Prix Points:
Prize Fund:
FIDE Rated: No
Handicap Accessible: No
Residency Restriction: No
Online Event: No

Organizer Overview

Mechanics' Institute
Email: chessroom@milibrary.org
Phone: 415-393-0110

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