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2026 Fall Tuesday Night Marathon

Welcome to our new website!
If you notice anything missing or in need of an update, feel free to let us know at chessroom@milibrary.org. We appreciate your feedback!

Top games are broadcasted on Chess.com with a 15-min delay:
https://www.chess.com/events/2026-fall-tuesday-night-marathon

 

Pre-TNM lecture schedule:

9/1 GM in Residence Sam Shankland

9/8 GM Mark Heimann

9/15 IM Elliott Winslow

9/22 IM Elliott Winslow

9/29 IM Elliott Winslow

10/6 IM Ladia Jirasek

10/13 IM John Donaldson
The Game of the Century: 70 Years Later


Register or Join Wait List Change Request Form

Info

  • Date: Tue, Sep 1 - Tue, Oct 13, 2026
  • Eligibility: Open to Everyone!
  • Rating: USCF & FIDE
  • Location: Mechanics' Institute, 4th Floor, 57 Post Street, San Francisco, CA 94104
  • Capacity: 120

Registration

  • Online Registration Open Until: Tuesday, October 13: 6:30 pm
  • Entry fee for Mechanics' Institute Members: $70
    • Play-up fee: $15
  • Entry fee for Non-Members: $100
    • Play-up fee: $20
  • Late fee: $10
  • $5 admin fee for all cancellations & refunds.

Two ways to check your entries:

  • Check the live entries on the Jumbula site by clicking on the View Entries button.
  • Check the processed entries here a day before the event.

 

Tournament Format

  • Tournament Format: Swiss System
  • Total Rounds: 7
  • Time control: 90 min basetime + 30 sec increment
  • Round Times: 9/1 6:30pm 9/8 6:30pm 9/15 6:30pm 9/22 6:30pm 9/29 6:30pm 10/6 6:30pm 10/13 6:30pm
  • Sections: 2000+ 1600-1999 Under1600

Play-up "200-rating point rule":

  • Players must have an 1800 USCF regular supplemental or actual regular rating to be eligible to play up to the 2000+ section.
  • Players must have a 1400 USCF regular supplemental or actual regular rating to be eligible to play up to the 1600-1999 section.

US Chess rating will be used for section determination and pairings.  FIDE or other ratings are only used if no US Chess rating is available. 

Pairings are based on the Sep 2026 regular supplemental regular US Chess rating.

 

Prize Fund

Total Prize Fund: $2,400

  • Prize explanations are coming after the event.
  • Please allow 2-3 weeks for processing prize checks.
  • Per IRS regulations, anyone who receives $2000 or more in cumulative prizes during a calendar year must complete a W-9, and Mechanics’ Institute will issue a 1099-MISC form for tax reporting purposes.

 

  • Prize Fund:

    • $2400 based on 80 paid entries
    • Actual Payout: $2460 based on 82 paid entries - 103% payout.
  2000+ 1600-1999 u1600
  Projected Actual Projected Actual Projected Actual
1st Place $500 $513 $300 $308 $200 $205
2nd Place $300 $308 $200 $205 $100 $103
3rd Place $200 $205 $100 $103 $50 $51
Best under2200 $100 $103        
Best under2000 $100 $103        
Best under1800     $75 $77    
Best under1600     $75 $77    
Best under1400         $50 $51
Best under1200         $50 $51

Prizes: 2026 Fall Tuesday Night Marathon

# Name Cash Prize credited to pool Section
1 GM Christopher Woojin Yoo (5.5/2667) 410.50 (2-way) 1st Place: $513;
2nd Place: $308;
2-way split of $821: $410.50 each		 2000+
4 IM Elliott Winslow (5.5/2203) 410.50 (2-way)
17 Rudransh Pathak (5.0/1929) 205.00 3rd Place: $205
6 Jeremy David Cawthon (4.5/2098) 103.00 Best u2200: $103
21 Cailen Jeremiah Melville (4.0/1843) 51.50 (2-way) Best u2000: $103;
2-way split: $51.50 each
23 Daniel Rob Perlov (4.0/1809) 51.50 (2-way)
2 CM Isaac Dan Zhao (6.5/1981) 308.00 1st Place: $308 1600-1999
1 Sudarshan Seshadri (5.0/1989) 102.67 (3-way) 2nd Place: $205;
3rd Place: $103;
3-way split of $308: $102.67 each
3 Rajdeep Pinge (5.0/1974) 102.67 (3-way)
4 Frederic Dutter (5.0/1900) 102.67 (3-way)
9 Hoa Long Tam (4.5/1692) 25.67 (3-way) Best u1800: $77;
3-way split: $25.67 each
10 Junior Mejia (4.5/1682) 25.67 (3-way)
16 Shahin Aghevli (4.5/1644) 25.67 (3-way)
21 Daniel J Sisti (3.5/1577) 15.40 (5-way) Best u1600: $77;
5-way split: $15.40 each
22 Keshav V Raman (3.5/1557) 15.40 (5-way)
23 Dominic A Vazquez (3.5/1542) 15.40 (5-way)
27 John Chan (3.5/1500) 15.40 (5-way)
31 Connor Harriman (3.5/1483) 15.40 (5-way)
1 Romeo Belmes Barreyro (6.0/1567) 154.00 (2-way) 1st Place: $205;
2nd Place: $103;
2-way split of $308: $154 each		 u1600
31 Julian Ossa (6.0/0) 154.00 (2-way)
12 Bryan D Martin (5.5/1233) 51.00 3rd Place: $51
7 Andy Liang (5.0/1300) 51.00 Best u1400: $51
15 Alexander Kojevnikov (4.5/1184) 51.00 Best u1200: $51

 

Byes

Byes are available for players in any rounds if 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 pairings will be done on Tuesday at 6:20 pm onsite. If you need a Round 1 bye, please email us by 4:00 pm.

  • Round 2-6 byes must be requested before the pairing of the round by Monday, 6 pm. Pairings usually are posted shortly after 8 pm on Monday, the day before the round.

  • Round 7 bye must be requested before the start of Round 5. 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 three rounds.
     

Eligibility

Tournament Rules

  • Forfeit time:
    • 30 minutes without prior notice
    • 60 minutes with prior notice. Please email to chessroom@milibrary.org or call us to request this!
      A player will be awarded a forfeit win against any opponent who doesn't show up according to the prescribed rules, and every effort will be made to find that player an extra game.
  • We provide clocks and set it up for players.
  • Games will be US Chess and FIDE regular rated. Modified FIDE rules apply.
     
  • What do the time controls mean?
    Time controls tell you how much time you have for each game.
    G90+30 means game in 90 minutes with a 30-second increment with each move. This means you get 90 minutes, your opponent gets 90 minutes, and with each move players get 30 seconds added to their clock.

Sick Policy:
The Mechanics' Institute Chess Club asks that any player who is feeling unwell withdraw from the tournament to help protect the health of others. The club reserves the right to deny entry to players who appear visibly ill. Players who withdraw due to illness before the start of the tournament will receive a full refund as a credit to their Jumbula account.


Mechanics' Institute Chess Club reserves the right to update any details of this event (including but not limited to sections, time control, round times, prize fund, etc.) as we get closer to the event date to ensure an excellent tournament experience for players.

Rounds

  • Download Round 1 as PGN Watch Replay of Round 1
  • Download Round 2 as PGN Watch Replay of Round 2
  • Download Round 3 as PGN Watch Replay of Round 3
  • Download Round 4 as PGN Watch Replay of Round 4
  • Download Round 5 as PGN Watch Replay of Round 5
  • Download Round 6 as PGN Watch Replay of Round 6
  • Download Round 7 as PGN Watch Replay of Round 7

Rounds are starting on time at Mechanics' so be sure to be on time. Clocks will not be delayed in starting for any reason.

For pgn files and to replay the games via a pgn viewer, please see above.

2026FallTNMRound1.pdf

2026FallTNMRound2.pdf

2026FallTNMRound3.pdf

2026FallTNMRound4.pdf

2026FallTNMRound5.pdf

2026FallTNMRound6.pdf

2026FallTNMRound7.pdf

Standings

Standings are updated after each round.

 

SwissSys 11.80.4 - Standings. 2026 Fall Tuesday Night Marathon: 2000+

# Name ID Rating Rd 1 Rd 2 Rd 3 Rd 4 Rd 5 Rd 6 Rd 7 Total Probable Prize
1 GM Christopher Woojin Yoo 15244943 2667 H--- H--- W6 W13 W12 H--- W2 5.5 410.50
2 IM Elliott Winslow 10363365 2203 W3 W18 B--- D5 W7 W4 L1 5.5 410.50
3 Rudransh Pathak 15361216 1929 L2 H--- W8 W22 H--- W11 W9 5.0 205.00
4 Jimmy Heiserman 12799690 2299 W19 W22 H--- H--- H--- L2 X13 4.5  
5 Samir Sen 12970386 2247 W14 W12 H--- D2 W18 H--- U--- 4.5  
6 Jeremy David Cawthon 15038608 2098 W15 H--- L1 W14 D17 W18 D7 4.5 103.00
7 Christophe Bambou 12734479 2113 W24 W21 D11 H--- L2 D13 D6 4.0  
8 Cailen Jeremiah Melville 14006141 1843 L12 D14 L3 B--- D15 W24 W18 4.0 51.50
9 Daniel Rob Perlov 16465203 1809 H--- D13 L18 W20 W22 X17 L3 4.0 51.50
10 IM Sandeep Sethuraman 15472832 2526 H--- H--- H--- U--- B--- F16 W19 3.5  
11 Andrew Zavgorodniy 32143889 2094 H--- W20 D7 L18 W23 L3 H--- 3.5  
12 Stephen Parsons 16566932 2012 W8 L5 D15 W16 L1 W21 U--- 3.5  
13 Phineas F Horowitz 14209057 1975 H--- D9 W20 L1 W19 D7 F4 3.5  
14 Hector Viadiu-Ilarraza 12586903 1933 L5 D8 W24 L6 L16 W20 W23 3.5  
15 Christopher Powers 30462548 1916 L6 W25 D12 L17 D8 D19 X21 3.5  
16 Divija Hasteer 13975247 1874 L22 B--- D23 L12 W14 X10 U--- 3.5  
17 Hugo Osm Santiago 14842497 1999 H--- H--- H--- W15 D6 F9 U--- 3.0  
18 Edward M Lewis 12601629 1966 B--- L2 W9 W11 L5 L6 L8 3.0  
19 Chase Wang 15015852 1951 L4 W24 D22 D21 L13 D15 L10 2.5  
20 John Boyer 16865157 1816 W25 L11 L13 L9 H--- L14 X24 2.5  
21 Dev Isak Kosuri 31395538 1802 X--- L7 H--- D19 H--- L12 F15 2.5  
22 Zelin Fang 17083043 2023 W16 L4 D19 L3 L9 H--- U--- 2.0  
23 Kristian Clemens 13901075 1970 H--- H--- D16 H--- L11 U--- L14 2.0  
24 Adam Mercado 16571026 1928 L7 L19 L14 H--- H--- L8 F20 1.0  
25 Michael Walder 10345120 1953 L20 L15 H--- U--- U--- U--- U--- 0.5  

SwissSys 11.80.4 - Standings. 2026 Fall Tuesday Night Marathon: 1600-1999

# Name ID Rating Rd 1 Rd 2 Rd 3 Rd 4 Rd 5 Rd 6 Rd 7 Total Probable Prize
1 CM Isaac Dan Zhao 31617557 1981 W17 W27 W16 D2 W9 W3 W6 6.5 308.00
2 Sudarshan Seshadri 12906250 1989 W14 H--- W11 D1 H--- W10 D7 5.0 102.67
3 Rajdeep Pinge 33104882 1974 W18 W26 D8 H--- W7 L1 W19 5.0 102.67
4 Frederic Dutter 12343420 1900 L19 W20 D14 W29 X25 H--- W9 5.0 102.67
5 Richard V Finacom 11452728 1841 L13 W18 L19 W32 W22 H--- W21 4.5  
6 Hoa Long Tam 16919862 1692 L28 W17 W24 W16 W19 D9 L1 4.5 25.67
7 Junior Mejia 14679391 1682 H--- H--- W32 W8 L3 W13 D2 4.5 25.67
8 Shahin Aghevli 30622638 1644 W33 W32 D3 L7 D15 D11 W16 4.5 25.67
9 Victor Yuhang Wu 30631341 1838 H--- W24 W29 W13 L1 D6 L4 4.0  
10 Daniel Sevall 12811060 1830 D20 L25 W35 D14 W12 L2 W28 4.0  
11 Isaac Mays-Smith 30338290 1735 H--- W22 L2 W30 H--- D8 H--- 4.0  
12 David Siegel 12595160 1676 L32 W21 D30 H--- L10 X31 W15 4.0  
13 Phil Ploquin 12535882 1659 W5 W28 H--- L9 D23 L7 X25 4.0  
14 Jamie Duif Calvin 10123640 1600 L2 W31 D4 D10 L16 W32 X23 4.0  
15 Zachary Wickliffe 32140128 1666 L23 W33 W28 D25 D8 D19 L12 3.5  
16 Sawyer Stults 31608516 1662 W21 W19 L1 L6 W14 H--- L8 3.5  
17 Nick Casares 10424364 1600 L1 L6 W33 D21 W20 L22 X30 3.5  
18 Daniel J Sisti 12734121 1577 L3 L5 W31 D24 W26 H--- H--- 3.5 15.40
19 Keshav V Raman 30692470 1557 W4 L16 W5 W27 L6 D15 L3 3.5 15.40
20 Dominic A Vazquez 30703139 1542 D10 L4 L22 W35 L17 B--- X32 3.5 15.40
21 John Chan 12561007 1500 L16 L12 X34 D17 W27 W30 L5 3.5 15.40
22 Connor Harriman 31650582 1483 H--- L11 W20 W26 L5 W17 U--- 3.5 15.40
23 Paul Krezanoski 16897133 1503 W15 H--- H--- H--- D13 U--- F14 3.0  
24 Thu Anh Le 17248797 1500 W34 L9 L6 D18 H--- H--- H--- 3.0  
25 William Xu 33165815 1484 H--- W10 H--- D15 F4 H--- F13 3.0  
26 Kyle Ewart Coventry Booth 30715175 1641 W30 L3 H--- L22 L18 H--- H--- 2.5  
27 William Milliken 11217109 1627 W31 L1 H--- L19 L21 H--- H--- 2.5  
28 Sacha Marino Sloan 32301287 1536 W6 L13 L15 H--- H--- H--- L10 2.5  
29 Samuel Agdamag 14874734 1482 H--- W35 L9 L4 U--- U--- W33 2.5  
30 Christian Brickhouse 30261226 1418 L26 X34 D12 L11 W33 L21 F17 2.5  
31 Georgia Pincus 33122236 1221 L27 L14 L18 B--- H--- F12 X34 2.5  
32 Ronald Florian-Moreta 33195365 1507 W12 L8 L7 L5 X35 L14 F20 2.0  
33 Andrew Braithwaite 31237898 1429 L8 L15 L17 X34 L30 W34 L29 2.0  
34 William Fitzgerald 17048414 1660 L24 F30 F21 F33 B--- L33 F31 1.0  
35 Richard Hack 12796129 1500 H--- L29 L10 L20 F32 H--- U--- 1.0  

SwissSys 11.80.4 - Standings. 2026 Fall Tuesday Night Marathon: u1600

# Name ID Rating Rd 1 Rd 2 Rd 3 Rd 4 Rd 5 Rd 6 Rd 7 Total Probable Prize
1 Romeo Belmes Barreyro 17018168 1567 W11 W7 W5 W6 W12 W8 L2 6.0 154.00
2 Julian Ossa 33237960 unr. L25 W27 W33 W19 W6 W4 W1 6.0 154.00
3 Bryan D Martin 14691010 1233 H--- L24 X32 W26 W22 W9 W11 5.5 51.00
4 Andy Liang 33236345 1300 W31 W21 W18 L12 W5 L2 W15 5.0 51.00
5 Robert Turner 12407483 1380 W27 W33 L1 W13 L4 H--- W16 4.5  
6 Ian R Jones 33193159 1323 W28 W29 W24 L1 L2 W21 D8 4.5  
7 Michael Isaiah Aspinwall 31657210 1234 X30 L1 W29 W21 L9 W13 H--- 4.5  
8 Mason Tobias 32440186 1227 W23 H--- W9 W18 H--- L1 D6 4.5  
9 Alexander Kojevnikov 31856555 1184 X17 D14 L8 W15 W7 L3 W19 4.5 51.00
10 Zhenhong Guan 15701381 1277 L29 X28 H--- H--- F21 X30 W23 4.0  
11 Daniel Smith 31779836 1146 L1 H--- X30 H--- W20 W19 L3 4.0  
12 Tyler Garrett 33118372 1105 H--- W15 W14 W4 L1 H--- U--- 4.0  
13 Marcus Schaller 33237937 unr. L33 B--- W20 L5 W18 L7 W21 4.0  
14 Nicholas M Brown 12446259 1324 W16 D9 L12 L22 L17 W18 W29 3.5  
15 Eli Albukerk 30219969 1271 H--- L12 W23 L9 W29 X17 L4 3.5  
16 Sergei Pimenov 31964181 819 L14 L23 D31 W32 W26 W20 L5 3.5  
17 Ian Robinett 33212973 unr. F9 H--- H--- H--- W14 F15 W25 3.5  
18 Albert Martin Starr 12844781 1500 W20 W25 L4 L8 L13 L14 X28 3.0  
19 Brandon Shien 30352643 1398 L21 W32 B--- L2 W27 L11 L9 3.0  
20 Justin Hallman 33185951 1176 L18 X31 L13 W29 L11 L16 W32 3.0  
21 Braxton Wardle 31661706 1035 W19 L4 W25 L7 X10 L6 L13 3.0  
22 Isaac Eaves 33254972 unr. H--- H--- H--- W14 L3 H--- U--- 3.0  
23 Kurt Noble 33242812 unr. L8 W16 L15 H--- H--- W27 L10 3.0  
24 Ummon Karpe 12932259 1276 H--- W3 L6 H--- H--- U--- U--- 2.5  
25 Kyle Weaver 32642649 1226 W2 L18 L21 L27 H--- W26 L17 2.5  
26 Jeffrey Gould 33272381 unr. H--- H--- H--- L3 L16 L25 W27 2.5  
27 Paul Blum 12748433 907 L5 L2 B--- W25 L19 L23 L26 2.0  
28 Branum Edward Spliethof 32661549 793 L6 F10 U--- W31 F30 W32 F18 2.0  
29 Ethan M Martin 15179785 338 W10 L6 L7 L20 L15 X31 L14 2.0  
30 Kevin Jacyna 33207052 unr. F7 H--- F11 H--- X28 F10 U--- 2.0  
31 Vishnu Sai Vinay 32551075 787 L4 F20 D16 L28 F32 F29 B--- 1.5  
32 Imelda Meili Hau 32196802 554 H--- L19 F3 L16 X31 L28 L20 1.5  
33 Shane Davis 32212404 1183 W13 L5 L2 U--- U--- U--- U--- 1.0  

SwissSys 11.80.4 - Standings. 2026 Fall Tuesday Night Marathon: Extra rated

# Name ID Rating Rd 1 Rd 2 Rd 3 Rd 4 Rd 5 Rd 6 Total Prize
1 Divija Hasteer 13975247 1874 U--- W23 W18 U--- W14 U--- 3.0  
2 Samuel Agdamag 14874734 1482 U--- U--- U--- W3 W16 U--- 2.0  
3 Mason Tobias 32440186 1227 U--- W20 W21 L2 U--- U--- 2.0  
4 Calvin Dees 30307126 1798 U--- U--- U--- U--- U--- W15 1.0  
5 David Siegel 12595160 1676 U--- U--- U--- U--- W11 U--- 1.0  
6 Bryan D Martin 14691010 1233 U--- U--- W17 U--- U--- U--- 1.0  
7 Alexander Kojevnikov 31856555 1184 W19 U--- U--- U--- U--- U--- 1.0  
8 Branum Edward Spliethof 32661549 793 U--- U--- W22 U--- U--- U--- 1.0  
9 Isaac Eaves 33254972 unr. U--- U--- U--- U--- W24 U--- 1.0  
10 Phil Ploquin 12535882 1659 U--- U--- U--- U--- U--- D11 0.5  
11 Dominic A Vazquez 30703139 1542 U--- U--- U--- U--- L5 D10 0.5  
12 Brandon Shien 30352643 1398 U--- U--- D13 U--- U--- U--- 0.5  
13 Daniel Smith 31779836 1146 U--- U--- D12 U--- U--- U--- 0.5  
14 Daniel Rob Perlov 16465203 1809 U--- U--- U--- U--- L1 U--- 0.0  
15 Nick Casares 10424364 1600 U--- U--- U--- U--- U--- L4 0.0  
16 Sacha Marino Sloan 32301287 1536 U--- U--- U--- U--- L2 U--- 0.0  
17 John Chan 12561007 1500 U--- U--- L6 U--- U--- U--- 0.0  
18 Zhenhong Guan 15701381 1277 U--- U--- L1 U--- U--- U--- 0.0  
19 Michael Isaiah Aspinwall 31657210 1234 L7 U--- U--- U--- U--- U--- 0.0  
20 Justin Hallman 33185951 1176 U--- L3 U--- U--- U--- U--- 0.0  
21 Braxton Wardle 31661706 1035 U--- U--- L3 U--- U--- U--- 0.0  
22 Paul Blum 12748433 907 U--- U--- L8 U--- U--- U--- 0.0  
23 Damien Robinson 16691232 857 U--- L1 U--- U--- U--- U--- 0.0  
24 Ethan M Martin 15179785 338 U--- U--- U--- U--- L9 U--- 0.0  

 

Pairings

Round 2-7 pairings are posted on Monday by 8pm.  Turn in Bye request by Monday at 6:00 PM!