2023 Spring Tuesday Night Marathon | Mechanics' Institute

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2023 Spring Tuesday Night Marathon

Tuesday, March 7, 2023 to Tuesday, April 18, 2023

2023 Spring Tuesday Night Marathon
March - April 2023

US Chess & FIDE-rated event


Standings -- Pairings -- Complete list of games (pdf&pgn)

Dates -- Tournament Format -- Byes -- Prize Fund

Registration -- Eligibility -- Tournament Rules -- FAQ

Max capacity: 80
All attendees must wear a mask.

Pre-TNM Lectures are back! Arrive at 5:45pm and listen to FM Paul Whitehead or a guest speaker covering some of the exciting news from the chess world as well as interesting games from our own tournaments!

NEW: Any change/update request? Please use our new Change Request Form.


1. Dates & Location

  • Seven Tuesdays in March - April 2023: 3/7, 3/14, 3/21, 3/28, 4/4, 4/11, 4/18
  • Location: Mechanics' Institute Chess Room
    57 Post Street, 4th Floor, San Francisco, CA 94104 (click here to map)


2. Tournament Format:

  • Tournament Format: individual Swiss
  • Total Rounds: 7 (1 round each Tuesday night: 3/7, 3/14, 3/21, 3/28, 4/4, 4/11, 4/18)
  • Round Times: Tuesday at 6:30PM Pacific Time (GMT+8)
  • Time Control: G/120;d5  (Game in 120 minutes with 5-second delay on each move.)
  • Games will be US Chess regular-rated as well as FIDE-rated. Tournament results will be submitted immediately after last round finished.
  • NEW!! Sections: 2000+, 1600-1999 and under1600.
  • Pairings are based on the March 2023 OTB supplemental regular US Chess rating.
  • Play-up: Players must have a 1800 USCF OTB or ONL supplemental or actual rating in order to be eligible to play up to the 2000+ section, and similarly, players must have a 1400 USCF OTB or ONL supplemental or actual rating in order to be eligible to play up to the 1600-1999 section.

3. Byes

  • Byes are available for players in any rounds in case they can't participate that evening, but would like to stay in the tournament.
  • A maximum of three half-point byes can be requested in this tournament.
  • Round 1-5 byes must be requested prior to the pairing of the round. Pairings usually are posted shortly after noon on Monday, the day before the round.
  • Round 6-7 byes must be requested before start of Round 3. Round 7 bye is irrevocable to prevent possible prize-fund manipulations.
  • Late registrations will receive a half-point bye for any missed round, up to a total of three rounds.

4. Prize Fund --  $2400 based on 80 paid entries 

  2000+ 1600-1999 u1600
1st Place $500 $300 $200
2nd Place $300 $200 $100
3rd Place $200 $100 $60
Best under2200 $100    
Best under2000 $100    
Best under1800   $60  
Best under1600   $60  
Best under1400     $60
Best under1200     $60
  • 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

6. Eligibility

7. Tournament Rules

  • Modified FIDE-rules apply.
  • Forfeit time is 60 minutes: if player is not present at the board by 7:30pm, the opponent will be awarded a forfeit win.

8. FAQ

  • What do the time controls mean?
    Time controls tell you how much time you have for each game.
    G120;d5 means game in 120 minutes (aka 2 hours) with a 5-second delay on each move. This means you get 120 minutes, your opponent gets 120 minutes, and at each move the clock counts down from 5 to 0 before the player's time starts. If a player doesn't use up the whole 5 seconds, the remainder of that time is lost.

  • How many games/rounds?
    The 7SS before the time control means
    it is a Swiss System tournament with seven rounds, or seven games, that a player can play in the tournament. The tournaments are never elimination, so win or lose, you can stay in the tournament.
  • Players Database
    For players who are interested in playing in our tournaments, please fill out our players database: https://forms.gle/X3hChCWbusHp4Ze56 to get email notifications about last-minute changes and invitational opportunities. 

  • Complete list of games
    We will publish the complete list of games after they have been processed.
    Check back each Monday to see any new uploads:
    TNM PDF file PGN file
    Round 1    
    Round 2    
    Round 3    
    Round 4    
    Round 5    
    Round 6    
    Round 7    

Prize Winners: 







Mechanics' Institute