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2026 Summer 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-summer-tuesday-night-marathon

 

Pre-TNM lecture schedule:

7/7: GM Mark Heimann: Squeezing Blood From A Stone: Winning Unwinnable Endgames

7/14: IM Elliott Winslow 

7/21: NM Daniel Cremisi: How to Play When You're Being Squeezed

7/28: IM Elliott Winslow 

8/4: GM Andrew Soltis: Reveal Your Chess Style

8/11: NM Daniel Cremisi

8/18: IM Elliott Winslow


Register or Join Wait List Change Request Form

Info

  • Date: Tue, Jul 7 - Tue, Aug 18, 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, August 18: 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: 7/7 6:30pm 7/14 6:30pm 7/21 6:30pm 7/28 6:30pm 8/4 6:30pm 8/11 6:30pm 8/18 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 July 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: coming after the tournament finished.
  2000+ 1600-1999 u1600
  Projected Actual Projected Actual Projected Actual
1st Place $500   $300   $200  
2nd Place $300   $200   $100  
3rd Place $200   $100   $50  
Best under2200 $100          
Best under2000 $100          
Best under1800     $75      
Best under1600     $75      
Best under1400         $50  
Best under1200         $50  

 

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.

Standings

Standings are updated after each round.

SwissSys 11.80.2 - Standings. 2026 Summer Tuesday Night Marathon: 2000+

# Name ID Rating Rd 1 Rd 2 Rd 3 Rd 4 Rd 5 Rd 6 Rd 7 Total
1 GM Christopher Woojin Yoo 15244943 2665 W21     H--- H---     1.0
2 Jimmy Heiserman 12799690 2270 W22     H--- H--- H---   1.0
3 Alex Hayden Shrauger 15328908 2216 W23     H---       1.0
4 IM Elliott Winslow 10363365 2200 W24             1.0
5 Rohan Das 15263634 2188 W25             1.0
6 Justin Fink 14646688 2077 W26             1.0
7 Abhishek Mallela 12888811 2077 W27 H--- H--- H---       1.0
8 Christopher Powers 30462548 1857 W19             1.0
9 Owen J Pang 16840995 1855 W20       H--- H--- H--- 1.0
10 Jeremy David Cawthon 15038608 2124 H---             0.5
11 Xiaofei Li 15155458 2122 H---             0.5
12 Kristian Clemens 13901075 1991 H--- H---           0.5
13 Phineas F Horowitz 14209057 1962 H---             0.5
14 Michael Walder 10345120 1950 H---             0.5
15 Adam Mercado 16571026 1933 H---             0.5
16 Edward M Lewis 12601629 1897 H---             0.5
17 Ritesh Dharmatti 17075682 1859 H---     H---       0.5
18 Cailen Jeremiah Melville 14006141 1852 H---             0.5
19 Bradley R Diller 10079993 2155 L8             0.0
20 Quincy Chen 13716492 2150 L9             0.0
21 Phillip Seitzer 12687814 2072 L1   H---         0.0
22 Stephen Parsons 16566932 2014 L2 H---           0.0
23 Kevin Kane 12698544 1999 L3     H--- H---     0.0
24 CM Isaac Dan Zhao 31617557 1995 L4             0.0
25 Divija Hasteer 13975247 1892 L5         H---   0.0
26 Jarod D Heap 15118541 1847 L6             0.0
27 Serena Liu 16887121 1804 L7             0.0

 

SwissSys 11.80.2 - Standings. 2026 Summer Tuesday Night Marathon: 1600-1999

# Name ID Rating Rd 1 Rd 2 Rd 3 Rd 4 Rd 5 Rd 6 Rd 7 Total
1 Frederic Dutter 12343420 1900 W26             1.0
2 Benjamin Simberg 30017727 1795 W27       H--- H---   1.0
3 Dev Isak Kosuri 31395538 1770 W28             1.0
4 Carl Anthony Pickering 30689170 1758 W29             1.0
5 John Boyer 16865157 1743 W30             1.0
6 David Siegel 12595160 1703 W31             1.0
7 Anirudh Gutta 30214880 1655 W32             1.0
8 Sawyer Stults 31608516 1649 W33             1.0
9 William Fitzgerald 17048414 1492 W23 H---           1.0
10 Andrew Burkett Rosston 32504699 1471 W24       H--- H--- H--- 1.0
11 Yulan Wang 30518588 1443 W25     H---       1.0
12 Neel Gore 30176757 1428 B---             1.0
13 Daniel Sevall 12811060 1824 D15             0.5
14 Gagik Babayan 15695454 1741 D16             0.5
15 Milan Patel 30830536 1615 D13         H---   0.5
16 John Chan 12561007 1524 D14             0.5
17 Rajdeep Pinge 33104882 1905 H--- H--- H---         0.5
18 Zachary Wickliffe 32140128 1678 H--- H--- H---     U---   0.5
19 Kyle Ewart Coventry Booth 30715175 1602 H---   H---         0.5
20 Jamie Duif Calvin 10123640 1600 H--- H---   H---       0.5
21 David Paul Toczyski 30713291 1516 H---     H---       0.5
22 Dominic A Vazquez 30703139 1446 H---           H--- 0.5
23 Phil Ploquin 12535882 1715 L9             0.0
24 Charlie Schaezlein 31629140 1665 L10             0.0
25 Willard Everett 11086411 1648 L11             0.0
26 Bennett McCutcheon 30503085 1647 L1             0.0
27 Nick Casares 10424364 1600 L2             0.0
28 Jinfeng Liu 16244917 1598 L3             0.0
29 Sacha Marino Sloan 32301287 1554 L4             0.0
30 Matthew Baumholtz 30823235 1532 L5             0.0
31 Samuel Agdamag 14874734 1482 L6             0.0
32 Thu Anh Le 17248797 1469 L7             0.0
33 Andrew Braithwaite 31237898 1466 L8         H--- H--- 0.0

 

SwissSys 11.80.2 - Standings. 2026 Summer Tuesday Night Marathon: U1600

# Name ID Rating Rd 1 Rd 2 Rd 3 Rd 4 Rd 5 Rd 6 Rd 7 Total
1 Connor Harriman 31650582 1443 W26             1.0
2 Walter Stein-Smith 30626624 1400 W27             1.0
3 Rowan Huang 33123109 1344 W28             1.0
4 Nicholas M Brown 12446259 1302 W29       H---     1.0
5 Alexander Kojevnikov 31856555 1175 W19             1.0
6 Tyler Garrett 33118372 920 W20           H--- 1.0
7 Brian Keith Langendorf 30893468 806 W21             1.0
8 Rodrigo Vicente Arevalo Rivas 33174147 unr. W22             1.0
9 Christian Groen 33100744 unr. W23             1.0
10 Lars Nordstrom 33133914 unr. W24             1.0
11 William Xu 33165815 unr. W25             1.0
12 Richard Hack 12796129 1500 H---           H--- 0.5
13 Samuel Schlenker 32793928 1416 H---       H---     0.5
14 Ummon Karpe 12932259 1290 H---             0.5
15 Anthony Lawson Defranco 32790409 1243 H--- H---           0.5
16 Dylan Asher Skurow 32467183 1243 H---             0.5
17 Joseph Clark 33104488 1164 H---             0.5
18 Samuel Tseng Brown 16380615 940 H---       H---     0.5
19 Albert Martin Starr 12844781 1500 L5             0.0
20 Robert Turner 12407483 1409 L6         H---   0.0
21 Clarence Harris 12543396 1400 L7             0.0
22 Kyle Weaver 32642649 1265 L8   H---         0.0
23 Bryan D Martin 14691010 1222 L9             0.0
24 Mason Tobias 32440186 1208 L10             0.0
25 Eric Wind 33098903 1205 L11             0.0
26 William Pang 31442592 1090 L1       H--- H--- H--- 0.0
27 Braxton Wardle 31661706 792 L2             0.0
28 Kaivalya Hariharan 17251770 790 L3             0.0
29 Kate Canessa 14102056 602 L4         H---   0.0

 

Pairings

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

Pairings for Round 1. 2026 Summer Tuesday Night Marathon: 2000+

Bd Res White Res Black
1 0 Phillip Seitzer (2072 0.0) 1 GM Christopher Woojin Yoo (2665 0.0)
2 1 Jimmy Heiserman (2270 0.0) 0 Stephen Parsons (2014 0.0)
3 0 Kevin Kane (1999 0.0) 1 Alex Hayden Shrauger (2216 0.0)
4 1 IM Elliott Winslow (2200 0.0) 0 CM Isaac Dan Zhao (1995 0.0)
5 0 Divija Hasteer (1892 0.0) 1 Rohan Das (2188 0.0)
6 0 Bradley R Diller (2155 0.0) 1 Christopher Powers (1857 0.0)
7 1 Owen J Pang (1855 0.0) 0 Quincy Chen (2150 0.0)
8 1 Justin Fink (2077 0.0) 0 Jarod D Heap (1847 0.0)
9 0 Serena Liu (1804 0.0) 1 Abhishek Mallela (2077 0.0)
  ½ Jeremy David Cawthon (2124 0.0)   BYE
  ½ Xiaofei Li (2122 0.0)   BYE
  ½ Kristian Clemens (1991 0.0)   BYE
  ½ Phineas F Horowitz (1962 0.0)   BYE
  ½ Michael Walder (1950 0.0)   BYE
  ½ Adam Mercado (1933 0.0)   BYE
  ½ Edward M Lewis (1897 0.0)   BYE
  ½ Ritesh Dharmatti (1859 0.0)   BYE
  ½ Cailen Jeremiah Melville (1852 0.0)   BYE

 

Pairings for Round 1. 2026 Summer Tuesday Night Marathon: 1600-1999

Bd Res White Res Black
10 1 Frederic Dutter (1900 0.0) 0 Bennett McCutcheon (1647 0.0)
11 ½ Milan Patel (1615 0.0) ½ Daniel Sevall (1824 0.0)
12 1 Benjamin Simberg (1795 0.0) 0 Nick Casares (1600 0.0)
13 0 Jinfeng Liu (1598 0.0) 1 Dev Isak Kosuri (1770 0.0)
15 1 Carl Anthony Pickering (1758 0.0) 0 Sacha Marino Sloan (1554 0.0)
16 0 Matthew Baumholtz (1532 0.0) 1 John Boyer (1743 0.0)
17 ½ Gagik Babayan (1741 0.0) ½ John Chan (1524 0.0)
18 1 William Fitzgerald (1492 0.0) 0 Phil Ploquin (1715 0.0)
19 1 David Siegel (1703 0.0) 0 Samuel Agdamag (1482 0.0)
20 1 Andrew Burkett Rosston (1471 0.0) 0 Charlie Schaezlein (1665 0.0)
21 1 Anirudh Gutta (1655 0.0) 0 Thu Anh Le (1469 0.0)
22 0 Andrew Braithwaite (1466 0.0) 1 Sawyer Stults (1649 0.0)
23 0 Willard Everett (1648 0.0) 1 Yulan Wang (1443 0.0)
  1 Neel Gore (1428 0.0)   BYE
  ½ Rajdeep Pinge (1905 0.0)   BYE
  ½ Zachary Wickliffe (1678 0.0)   BYE
  ½ Kyle Ewart Coventry Booth (1602 0.0)   BYE
  ½ Jamie Duif Calvin (1600 0.0)   BYE
  ½ David Paul Toczyski (1516 0.0)   BYE
  ½ Dominic A Vazquez (1446 0.0)   BYE

 

Pairings for Round 1. 2026 Summer Tuesday Night Marathon: U1600

Bd Res White Res Black
24 0 Albert Martin Starr (1500 0.0) 1 Alexander Kojevnikov (1175 0.0)
25 0 William Pang (1090 0.0) 1 Connor Harriman (1443 0.0)
26 0 Robert Turner (1409 0.0) 1 Tyler Garrett ( 920 0.0)
27 1 Brian Keith Langendorf ( 806 0.0) 0 Clarence Harris (1400 0.0)
28 1 Walter Stein-Smith (1400 0.0) 0 Braxton Wardle ( 792 0.0)
29 0 Kaivalya Hariharan ( 790 0.0) 1 Rowan Huang (1344 0.0)
30 1 Nicholas M Brown (1302 0.0) 0 Kate Canessa ( 602 0.0)
31 1 Rodrigo Vicente Arevalo Rivas (unr. 0.0) 0 Kyle Weaver (1265 0.0)
32 0 Bryan D Martin (1222 0.0) 1 Christian Groen (unr. 0.0)
33 1 Lars Nordstrom (unr. 0.0) 0 Mason Tobias (1208 0.0)
34 0 Eric Wind (1205 0.0) 1 William Xu (unr. 0.0)
  ½ Richard Hack (1500 0.0)   BYE
  ½ Samuel Schlenker (1416 0.0)   BYE
  ½ Ummon Karpe (1290 0.0)   BYE
  ½ Anthony Lawson Defranco (1243 0.0)   BYE
  ½ Dylan Asher Skurow (1243 0.0)   BYE
  ½ Joseph Clark (1164 0.0)   BYE
  ½ Samuel Tseng Brown ( 940 0.0)   BYE