Mechanics' Weekend Blitz - 2026 Aug

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 6 boards are broadcasted on Chess.com: coming as we get closer to the event.


Register or Join Wait List Change Request Form

Info

  • Date: Sun, Aug 16 , 2026
  • Eligibility: Open to Everyone!
  • Rating: USCF & FIDE
  • Location: Mechanics' Institute, 4th Floor, 57 Post Street, San Francisco, CA 94104
  • Capacity: 80

Registration

  • Online Registration Open Until: Sunday, August 16: 2:00 pm
  • Onsite Registration: 2:00-2:45pm
  • Entry fee for Mechanics' Institute Members: $25
    • Play-up fee: $10
  • Entry fee for Non-Members: $30
    • Play-up fee: $15
  • Late fee: $10
  • $5 admin fee for all cancellations & refunds.
  • Two ways to check your entries:
    • Check the live entries on the Jumbula page.
    • Check the processed entries here a day before the event.
  • Please note our late fee may be in effect and is usually added 24 hours before the start of a tournament in case capacity reaches 90%.

Tournament Format

  • Tournament Format: Swiss System
  • Total Rounds: 7
  • Time control: 3 min basetime + 2 sec increment
  • Round Times: 8/16 3:00pm and remaining rounds are on a rolling schedule
  • Sections: 1800+ Under1800

Play-up "200-rating point rule":

  • Players must have an 1600 USCF regular supplemental or actual regular rating to be eligible to play up to the 1800+ 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 Aug 2026 regular supplemental regular US Chess rating.

 

Prize Fund

  • 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:

    • $400 based on 40 paid entries
    • Actual Payout:  $250 based on 25 paid entries - 63% payout.
  1800+ u1800
  Projected Actual Projected Actual
1st Place $125 $78 $75 $47
2nd Place $75 $47 $50 $31
3rd Place $50 $31 $25 $16

Prizes: Mechanics' Weekend Blitz - 2026 Blitz

# Name Place Cash Prize credited to pool Section
1 GM Christopher Woojin Yoo (7.0/2667) 1st 78.00 1st Place: $78 1800+
2 IM Ladia Jirasek (5.0/2432) 2nd 47.00 2nd Place: $47
4 Jacob Cameron Sevall (4.5/2140) 3rd 31.00 3rd Place: $31
5 Rithvik Prakki Prakki (6.0/1618) 1st 39.00 (2-way) 1st Place: $47;
2nd Place: $31;
2-way split: $39 each
U1800
12 Ryan Chen (6.0/1222) 1T 39.00 (2-way)
9 Joshua Jonathan Weimer (5.0/1359) 3rd 16.00 3rd Place: $16

 

Byes

  • Byes are available for players in any round in case they can't participate but would like to stay in the tournament.
  • Byes can be requested up to 15 minutes prior to the round start time.
  • Last round bye must be requested by the start of Round 1.
  • Late registrations will receive a 0.5 bye for any missed round, up to a total of 2 rounds.

Eligibility

Tournament Rules

  • Forfeit time: 3 minutes. 
  • We provide clocks and set it up for players.
  • Games will be US Chess and FIDE blitz rated. Modified FIDE rules apply.
     
  • What do the time controls mean?
    Time controls tell you how much time you have for each game.
    G/3+2 means game in 3 minutes with a 2-second increment with each move. This means you get 3 minutes, your opponent gets 3 minutes, and with each move players get 2 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

Processed entries are coming 1 day before the event starts.

Final standings will be posted after the event is finished.

SwissSys 11.80.3 - Standings. Mechanics' Weekend Blitz - 2026 Blitz: 1800+

# Name ID Rating Rd 1 Rd 2 Rd 3 Rd 4 Rd 5 Rd 6 Rd 7 Total Prize
1 GM Christopher Woojin Yoo 15244943 2667 W8 W4 W2 W5 W6 W3 W7 7.0 78.00
2 IM Ladia Jirasek 14196222 2432 W5 W6 L1 W4 L3 W10 W8 5.0 47.00
3 Jacob Cameron Sevall 15760681 2140 D7 W8 L6 W9 W2 L1 W5 4.5 31.00
4 Sebastian Suarez 16875347 2334 W10 L1 W7 L2 L5 W8 W9 4.0  
5 Derek Jia 14836577 2014 L2 W9 W10 L1 W4 W6 L3 4.0  
6 Denis Bakhvalov 32822234 2048 W9 L2 W3 W7 L1 L5 D10 3.5  
7 Daniel Sevall 12811060 1849 D3 W10 L4 L6 W8 D9 L1 3.0  
8 Aaron A Thompson 14004907 2023 L1 L3 W9 W10 L7 L4 L2 2.0  
9 Avyukth Ganapathy Viswanath 30613480 1679 L6 L5 L8 L3 W10 D7 L4 1.5  
10 Frederic Dutter 12343420 1900 L4 L7 L5 L8 L9 L2 D6 0.5  

SwissSys 11.80.3 - Standings. Mechanics' Weekend Blitz - 2026 Blitz: U1800

# Name ID Rating Rd 1 Rd 2 Rd 3 Rd 4 Rd 5 Rd 6 Rd 7 Total Prize
1 Rithvik Prakki Prakki 15271723 1618 W13 L2 W12 W10 W11 W9 W7 6.0 39.00
2 Ryan Chen 16097990 1222 X6 W1 L9 W5 W7 W3 W11 6.0 39.00
3 Joshua Jonathan Weimer 30058634 1359 X20 W5 L11 W4 W9 L2 W6 5.0 16.00
4 Alex Yuen 32595736 1307 W19 D16 L5 L3 W12 W17 W9 4.5  
5 David Siegel 12595160 1703 W10 L3 W4 L2 W13 L7 W16 4.0  
6 Nate Baker 16930886 1697 F2 U--- W18 W14 W16 W10 L3 4.0  
7 Bryce M Wong 13644104 1567 L14 W18 W8 W16 L2 W5 L1 4.0  
8 Samuel Agdamag 14874734 1482 W18 L11 L7 L12 W15 W19 W14 4.0  
9 Neel Gore 30176757 1428 W15 W14 W2 W11 L3 L1 L4 4.0  
10 Dylan Asher Skurow 32467183 1262 L5 W15 W14 L1 W17 L6 W12 4.0  
11 Adler Benaman 16416224 1100 W17 W8 W3 L9 L1 W16 L2 4.0  
12 Shane Davis 32212404 1132 L16 W19 L1 W8 L4 W13 L10 3.0  
13 Mixtli Carter 32876831 1073 L1 L17 W15 W18 L5 L12 B--- 3.0  
14 Shivaansh Girish 32467199 1058 W7 L9 L10 L6 W19 B--- L8 3.0  
15 Jordan Murgatroyd 33197807 unr. L9 L10 L13 B--- L8 W18 W17 3.0  
16 Na Chea 15147161 1664 W12 D4 W17 L7 L6 L11 L5 2.5  
17 Georgia Pincus 33122236 1639 L11 W13 L16 W19 L10 L4 L15 2.0  
18 Owen Michael Lopez-Oneal 31909069 677 L8 L7 L6 L13 B--- L15 W19 2.0  
19 Michael G Spooner 12690069 unr. L4 L12 B--- L17 L14 L8 L18 1.0  
20 Richard Robinet-Duffo 33220182 unr. F3 U--- U--- U--- U--- U--- U--- 0.0