CChessStats

2nd Koltanowski Memorial Tournament - 1600-1999

Open SwissStandard

32 players participated in this 4-round tournament, held from 16 Aug 2025 to 17 Aug 2025 in San Francisco, CA, United States. 2 federations represented. Top 10 Elo average was 1779, and top seed was Hovik Manvelyan (🇺🇸 USA, 1933).

William Obrien (🇺🇸 USA, 1762) won with 4.0/4, ahead of Serena Liu (3.0) and Kayden Pak Mo (3.0). Obrien won solo starting round 3.

The biggest upset came in round 1: Youting Long (1505) beat Rogelio Aram Gongora Zermeno (1914), a +409-point gap.

Location
🇺🇸San Francisco, CA, United States
Dates
16 Aug 2025 → 17 Aug 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 4 rounds
Top seed
🇺🇸Hovik Manvelyan1933
Avg top 10
1,779
Participants
32
Federations · 2 represented
🇺🇸United States of America×31
🇲🇽Mexico×1
Top 3

How it unfolded

Top 6 · 4 rounds

William Obrien led from R3; +1.0-point edge over the runner-up.

Co-leaders
12
3
1
1
1234R1R2R3R4
R3–R4 · LEAD HELD

William Obrien never relinquished the lead after R3; final gap +1.0 over the runner-up.

WIN STREAKS · 2 top finishers

William Obrien 4 wins (R1–R4)Rogelio Aram Gongora Zermeno 3 wins (R2–R4)

Grille américaine

#PlayerEloFedR1R2R3R4PtsBu C1BuSBPerfΔ
1Obrien, William1762USA+15N+13B+14N+5B4.06.58.58.502540+74.8
2Liu, Serena1683USA+16N=9B=8N+13B3.07.09.06.501803+12.0
3Mo, Kayden Pak1602USA+30B+20N5B+14B3.06.06.03.501920+49.6
4Gongora Zermeno, Rogelio Aram1914MEX6B+26N+25B+19N3.05.56.54.001762-10.6
5Patankar, Shubham1769USA+17N=7B+3N1N2.59.511.56.251703-12.8
6Long, Youting1505USA+4N=10B=7N=8B2.58.010.56.751731+44.0
7Viswanath, Naren Ganapathy1507USA+27B=5N=6B=9N2.57.58.54.751745+37.2
8Bharadwaj, Samarth Ram1560USA=25B+22N=2B=6N2.57.08.04.751627+14.0
9Mythil, Arnav0USA+31B=2N=20B=7B2.57.07.03.5016700.0
10Seidel, Eli1577USA+26B=6N11B+21N2.56.57.53.751712+28.4
11Brahmanapally, Sarvagnya1614USA=28N+23B+10NF2.55.05.04.502359+34.0
12Sundaram, Deepak1699USA=22B=25N=21B+20N2.54.55.53.501715+4.8
13Goel, Darsh1662USA+18B1N+29B2N2.09.09.52.501690+6.4
14Chen, Xiaoshan1831USA+29B+19N1B3N2.09.09.52.501662-34.0
15Viswanath, Avyukth Ganapathy1698USA1B+31N+24B17N2.07.57.51.501645-11.6
16Jonnalagada, Navaneet Vishnusai0USA2B=29N+22B=24N2.06.06.52.5016060.0
17Miller, Theodore1562USA5B+27NF+15B2.05.55.53.001810+40.0
18Gu, Thomas1654USA13N21B+23N+30B2.05.05.01.501527-24.8
19Pang, Elena Hingyip1653USA+32N14B+30N4B2.05.05.00.001767+15.6
20Ong, Matthew1782USA+21N3B=9N12B1.58.09.52.751560-36.0
21Shokeen, Ayaan1722USA20B+18N=12N10B1.57.08.53.251599-34.8
22Lee, Shan Ramesh1483USA=12N8B16N+26B1.57.08.02.251618+22.0
23DB, Pranav1541USA=24B11N18B+31N1.56.06.00.751552+1.2
24Liu, Jinfeng1636USA=23N=28B15N=16B1.55.56.52.251428-21.2
25Liao, Aiden1462USA=8N=12B4N27B1.08.09.02.501483+0.8
26Wang, Ayden1596USA10N4B+31B22N1.07.07.00.001456-31.2
27Amin, Eshaan Kashyap1587USA7N17BF+25N1.05.55.51.001383-32.8
28Yu, Andrew0USA=11B=24NFF1.04.04.02.0016220.0
29Wang, Angela Zixi1632USA14N=16B13NF0.56.06.01.00945-28.4
30Lee, Angelina R0USA3NF19B18N0.07.07.00.008470.0
31Navaneetha Prabhu, Arjunsai1628USA9N15B26N23B0.06.07.00.00812-62.4
32Manvelyan, Hovik1933USA19BFFF0.02.02.00.00851-16.8

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets